Modified Y Medium - BioReagent

Cat. No.: M1528593

GRADE & PURITY BioReagent

Storage

Room temperature

Shipped In

Normal

Overview

For isolation of Yersinia enterocolitica

Specifications

Specifications & Purity

BioReagent

Storage

Room temperature

Shipped In

Normal

Grade

BioReagent

Product Line

Biological Products

Application Protocols

The following are general, literature-based guidelines for preparing and using Modified Y-type media. They are not item-specific; always follow the CoA/Spec Sheet for this SKU.

A. Medium preparation (general):

• Calculate the required amount per liter as indicated on the product label/CoA (Not specified for this item).
• Add to ~80–90% of the final water volume while stirring; mix until fully dissolved. Adjust volume with water.
• If sterilizing by autoclave, dispense into suitable vessels with headspace; autoclave per institutional SOPs. For heat-labile supplements, sterile-filter (0.22 µm) and add aseptically after cooling to ~45–55°C.
• Verify and, if needed, adjust pH using sterile acid/base consistent with your protocol.

B. Inoculation and cultivation (general for yeasts):

• Inoculate with a fresh colony or a defined volume from a pre-culture to an initial OD600 ~0.05–0.1.
• Incubate at organism-appropriate temperature (e.g., many Saccharomyces strains at ~30°C) with aeration/agitation (180–250 rpm); do not exceed ~20–30% flask fill volume to ensure oxygen transfer.
• Monitor growth by OD600, CFU, or dry cell weight. Harvest at desired phase (mid-log for physiology; stationary for yield assessments).

C. Plating (general):

• If preparing agar plates, add agar per label (Not specified for this item); autoclave, cool to ~55°C, pour plates aseptically, and allow to solidify.

D. Storage of prepared medium:

• Use promptly or store refrigerated if compatible; minimize repeated warming to preserve performance (item-specific stability Not specified; refer to CoA).

Dispose of spent cultures/media per biosafety guidelines.

Biological Roles

Modified Y Medium serves as a nutrient environment for microbial growth (literature, general). While the product itself has no singular biological role, its components collectively support fundamental cellular processes in yeasts and some fungi:

• Carbon metabolism: Carbohydrate sources fuel glycolysis, fermentation, and respiration, influencing biomass accumulation and metabolite profiles.
• Nitrogen and sulfur assimilation: Peptides, amino acids, and ammonium/sulfate salts supply precursors for protein and cofactor biosynthesis.
• Vitamins and cofactors: Yeast extract typically provides B-vitamins (e.g., niacin, biotin) that act as enzyme cofactors in central metabolism.
• Ionic homeostasis and buffering: Phosphate or other salts maintain osmotic balance and pH within ranges favorable for yeast proliferation.
• Stress response modulation: The presence/absence of specific nutrients can induce heat-shock proteins, oxidative stress defenses, or unfolded protein response, informing studies in systems biology and genetics.

Use cases in research (general):

• Growth kinetics, mutation screening, and phenotype characterization in Saccharomycetales.
• Recombinant expression in yeast hosts where medium composition affects induction strength and secretion efficiency.
• Metabolomics and flux analysis, where controlled nutrient supply enables reproducible steady states.

Note: Exact biological performance depends on the specific "Modified" formulation; consult the CoA/Spec Sheet for composition details and any growth-promotion testing.

Buffer Applications

This product is a growth medium rather than a dedicated buffer system. However, medium performance is influenced by its buffering capacity (literature, general).

• Typical buffer components: Many Y-type media incorporate phosphate or other salts that confer modest buffering in the near-neutral to mildly acidic range. The exact buffer and target pH are Not specified for this item; refer to CoA/Spec Sheet.
• Practical guidance:
  • If precise pH control is critical (e.g., enzymology, pH-sensitive inductions), verify the working pH of your prepared medium and, if necessary, augment with a compatible buffer (e.g., phosphate, citrate, MES) post-sterilization or via co-sterilization as appropriate.
  • Monitor pH drift during cultivation; yeast metabolism can acidify or alkalinize media depending on carbon/nitrogen sources and oxygenation.
• Electrophoresis/cell culture: Not typically used as an electrophoresis buffer or for mammalian cell culture. Choose dedicated buffers/media designed for those applications.

Green Alternatives

Sustainability considerations for culture media focus on resource sourcing, energy use during sterilization, and waste minimization.

• Resource sourcing (general):

  • Consider media based on plant-derived peptones and sustainably sourced yeast extracts to reduce animal-derived inputs.
  • Evaluate suppliers that document responsible manufacturing and reduced carbon footprint for nutrient components.

• Process efficiency:

  • Prepare only the volume required to minimize expired or unused sterile media.
  • When compatible with your workflow, consider sterile filtration of heat-labile components to avoid repeated thermal cycles.
  • Autoclave at validated minimal time/temperature sufficient for sterility (per institutional standards) to reduce energy consumption.

• Waste reduction:

  • Consolidate media prep to decrease packaging waste (e.g., bulk formats where appropriate).
  • Treat spent media via on-site sterilization (autoclave) prior to drain disposal if permitted by local regulations, minimizing chemical disinfectant use.

Comparison (literature, general):

• Autoclaved complex media: Robust sterility, but higher energy and potential nutrient degradation.
• Filter-sterilized media or components: Lower thermal impact and preserved vitamins, but requires 0.22 µm filtration and aseptic facilities; may be less suitable for particulate-containing formulations.

Select the approach that maintains scientific quality while lowering environmental burden.

Pharmaceutical Uses

For research use only (from Product Data). Not for human or veterinary use, diagnostic procedures, or GMP manufacturing.

R&D and process-development contexts (literature, general):

• Microbial strain screening and stability studies: Evaluate genetic constructs and phenotype stability in yeast hosts under different nutrient regimes.
• Seed-train development: Establish inoculum strategies for upstream bioprocessing in yeasts prior to transfer into production media/bioreactors.
• Analytical sample preparation: Generate standardized biomass for method development (e.g., qPCR normalization, proteomics sample prep).
• Reference matrix: Use as a consistent growth matrix for comparability during process parameter optimization (e.g., DO, agitation, feed strategies).

Regulatory note: This BioReagent medium is not accompanied by compendial monographs (e.g., USP/EP) for drug product or drug substance manufacture. For translational work, users should qualify the medium within their internal quality systems and transition to appropriate GMP-grade equivalents when required.

Physical Properties

Item-specific physicochemical specifications have not been provided for this SKU.

• Appearance: Not specified for this item; refer to CoA/Spec Sheet.
• pH (at working concentration): Not specified for this item; refer to CoA/Spec Sheet. (Typical literature ranges for Y-type media after sterilization are ~pH 5.8–6.5, depending on buffer and carbohydrate content.)
• Osmolality: Not specified for this item; refer to CoA/Spec Sheet. (Literature values vary widely with formulation.)
• Solubility: Formulated for complete dissolution in water at the stated preparation concentration (literature, general). Agitation and warm water often aid dissolution.
• Sterility: Supplied non-sterile unless explicitly labeled otherwise (general practice; confirm on label/CoA).
• Shelf life: Not specified for this item; refer to CoA/Spec Sheet.
• BP/MP, density, refractive index, logP, pKa: Not applicable to complex solid/liquid mixtures of nutrients.

Practical notes (literature, general):

• Dissolution is improved by gradual addition to water with vigorous stirring to prevent clumping; adjust volume after full dissolution.
• If carbohydrates are present, post-autoclave darkening (Maillard browning) can occur; follow recommended sterilization parameters on the CoA to minimize nutrient degradation.

Quality & Grades

• Item grade: BioReagent (from Product Data)

  • Meaning (general): Suitable for biological research applications, including preparation of microbiological or cell-based experimental systems. BioReagent grade emphasizes low bioburden and consistent performance in biological workflows but is not equivalent to GMP- or clinical-grade materials.

• Composition disclosure: Not specified for this item; refer to CoA/Spec Sheet for exact formulation, if provided. Modified Y formulations may adjust carbon source, nitrogen balance, vitamins, or buffering systems to achieve targeted growth kinetics or expression outcomes (literature, general).

• Performance considerations (general):

  • Lot-to-lot consistency is critical for reproducible growth rates, biomass yields, and recombinant protein expression. Review Certificate of Analysis (CoA) for any performance tests (e.g., growth promotion with representative strains) when available.
  • Low background absorbance/fluorescence may be desirable for optical density (OD600) monitoring or reporter assays; BioReagent media are typically controlled to minimize interfering components (literature, general).

• Stabilizers/antimicrobials: Not specified for this item; refer to CoA/Spec Sheet. Media are generally supplied without antibiotics or antimycotics unless explicitly stated.

• Documentation: For regulated research environments, retain CoA/SDS and record prep details (lot, concentration, sterilization method) to ensure traceability and compliance with QA systems.

Reaction & Applications

This section is interpreted as “Applications” for a biological medium.

Primary research applications (literature, general):

• Cultivation of yeasts and fungi: Modified Y formulations are commonly used for Saccharomyces, Candida, Pichia, and related genera, supporting robust biomass formation and routine maintenance.
• Starter cultures and seed trains: Reliable inoculum development prior to scale-up in fermenters; consistent lag and log-phase kinetics are advantageous for bioprocess R&D.
• Recombinant protein expression (yeasts): Suitable as base media for plasmid maintenance, expression induction (when used with appropriate promoters/feeds), and screening of expression conditions.
• Antimicrobial susceptibility screening (yeasts/fungi): Provides a defined growth background to compare compound activity; ensure the chosen medium does not chemically inactivate test agents.
• Physiology and systems biology: Carbon- or nitrogen-source modifications influence stress responses, metabolite profiling, and adaptive laboratory evolution studies.

Practical tips (general):

• Use freshly prepared sterile medium; pre-warm to incubation temperature for consistent lag time.
• For optical density measurements, blank spectrophotometer with uninoculated medium from the same batch to correct for baseline absorbance.
• Aerobic organisms benefit from adequate agitation (e.g., 180–250 rpm in baffled flasks) to enhance oxygen transfer; avoid overfilling flasks (>20–30% volume).
• If performing selection or induction, add supplements (e.g., antibiotics, inducers) aseptically after cooling to ~45–55°C post-sterilization to preserve activity.

Reaction Conditions

Not applicable in the context of chemical reactions. For biological use, see Application Protocols for typical culture conditions (literature, general). Medium-specific incubation parameters (e.g., temperature, agitation, aeration) depend on the organism and experimental goals.

Safety & Handling

Item-specific GHS data have not been provided.

• GHS classification, signal word, H-statements, pictograms: Not specified for this item; refer to SDS.
• General laboratory precautions (literature, best practice):
  • Wear lab coat, gloves, and safety glasses when handling powders/liquids to avoid skin/eye contact and inhalation of dust/aerosols.
  • Avoid generating dust; use in a well-ventilated area or a biological safety cabinet if handling large quantities or preparing sterile media.
  • If sterilizing by autoclave, use autoclavable containers with headspace; do not overtighten caps. Beware of superheated liquids; allow pressure to normalize before opening.
• First aid (overview; defer to SDS):
  • Inhalation: Move to fresh air; seek medical attention if irritation persists.
  • Skin/eye contact: Rinse with water for several minutes; remove contaminated clothing; seek medical attention if irritation persists.
  • Ingestion: Rinse mouth; do not induce vomiting; seek medical advice.
• Incompatibilities (general): Store away from strong oxidizers and moisture. If carbohydrates/peptones are present, keep dry to prevent clumping and microbial contamination.
• Microbiological risk: Used to cultivate microorganisms; treat spent media and culture residues as biohazardous. Autoclave waste before disposal according to institutional biosafety protocols.
• Authoritative source: Always consult the product’s SDS for definitive hazard, disposal, and emergency-response information.

Solvent Selection

Not typically applicable. Modified Y Medium is intended for aqueous preparation and use; organic solvent selection is not relevant.

• Practical note (general): Use high-purity water (e.g., ASTM Type 1/2 or equivalent) to avoid ionic or organic contaminants that may affect microbial growth or downstream analytics.
• If supplementing with sensitive additives (e.g., vitamins), consider separate sterile filtration of heat-labile components and aseptic combination post-autoclave (literature, general).

Storage & Reconstitution

• Storage conditions (as supplied): Room temperature (from Product Data). Protect from moisture and microbial contamination by keeping containers tightly closed.
• Shipping: Normal (from Product Data).
• Reconstitution/Preparation: Not specified for this item; refer to CoA/Spec Sheet. General guidance (literature): dissolve in high-purity water at the concentration specified on the label; sterilize by autoclaving or filtration as appropriate. Add heat-labile supplements after cooling under aseptic conditions.
• Stability of prepared media: Not specified for this item; refer to CoA/Spec Sheet. As a general practice, store sterile liquid media at 2–8°C for short periods and avoid prolonged storage to limit nutrient degradation and contamination risk.
• Freeze-thaw: Not applicable to dry media. Avoid freezing prepared media unless validated for your application, as repeated freeze-thaw can precipitate components and alter performance.
• Documentation: Record lot number, preparation date, sterilization method, and any supplements added for experimental reproducibility.

Note: For research use only (from Product Data). Always consult the item’s CoA and SDS for definitive preparation and storage instructions.

Structure & Identity

This product is a complex, multi-component growth medium rather than a single defined chemical entity. As such, conventional single-compound identifiers do not apply.

• Item type: Complex culture medium (Modified Y Medium)
• Molecular formula: Not applicable to mixtures (Not specified for this item; refer to CoA/Spec Sheet.)
• Molecular weight: Not applicable to mixtures (Not specified for this item; refer to CoA/Spec Sheet.)
• SMILES, InChI, InChIKey: Not applicable for multi-component media
• Structural features (description): Typically derived from combinations of yeast extract, peptones/tryptone, carbohydrates (e.g., glucose), minerals, and buffering salts in defined or semi-defined proportions (literature, general). Exact composition for this SKU is Not specified for this item; refer to CoA/Spec Sheet.

2D structure in words (general, literature): As a formulated blend, the product contains a distribution of small molecules (amino acids, peptides, vitamins, nucleotides), carbohydrates, and inorganic ions; no single backbone or ring system represents the material. The functional attributes arise from nutrient balance and osmolarity rather than a specific covalent structure.

Synthetic Utility

Not applicable. Modified Y Medium is a biological growth medium and is not used as a synthetic reagent or building block in chemical synthesis. For synthesis-related information, see other catalog categories (e.g., solvents, reagents, catalysts).

Target Specificity

Not applicable. This product is not an antibody, probe, or ligand-based reagent and does not possess target binding specificity. It is a general-purpose growth medium for microbial cultivation.