Browse protein products used in research and assay development (where available). Use filters to locate the protein or family you need and review key identifiers, activity or purity information, and documentation to support confident selection.
Proteins & Enzymes
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Cytokines
985Explore cytokines for immune signaling studies, cell culture supplementation, differentiation workflows, and functional assays. Use this page to compare signaling proteins across research applications.
Target proteins
2,476Browse target proteins used in assay development, binding studies, screening, and pathway research. This category helps you locate proteins tied to specific biological targets and mechanisms.
Enzymes
1,355Find enzyme products for catalysis studies, assay development, standards, and biochemical workflows. Browse enzyme reagents used in functional testing and pathway-related experiments.
Browse native proteins for functional studies, standards, controls, and assay support. This page helps you compare protein reagents closer to their natural form or source context.
Others Protein
2,154Explore additional research protein products that do not fit the main protein subgroups. Use this category to discover supporting protein reagents for diverse assay and biology workflows.
Popular Products
- Tyrosinase from mushroomLyophilized EnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. ≥500 units/mg dry weightIn Stock Item #: T128536View ProductPricing & Pack Sizes
Technical Identifiers
- Accession #
- Q00024; O42713; C7FF04; C7FF05
- Bioactivity
- ≥500 units/mg dry weight
- Synonyms
- Polyphenol Oxidase | Catechol Oxidase | Monophenol Monooxygenase | Monophenol | dihydroxyphenylalanine:oxygen oxidore...
- α-1,4-Galactosyltransferase (LgtC)CAS: 52725-57-2 Formula:Liquid Bioactive ? Bioactive grade — verified to retain biological activity in functional assays. Use when the molecule must be functionally active, not just pure. Recombinant ? Recombinant — produced via recombinant expression for defined sequence and consistency. Use for reproducible, animal-free proteins of known origin. ActiBioPure™ ? ActiBioPure™ — Aladdin's premier line for bioactive and recombinant products. Use when both high purity and preserved biological activity are required. High Performance ? High-performance grade with optimized purity and performance characteristics. Use for sensitive analyses where ordinary grades fall short. EnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. ≥90%(SDS-PAGE) expressed in E.coli;≥2U/mg protein; Protein concentration: See COAOut of Stock Item #: G293642View ProductPricing & Pack Sizes
Technical Identifiers
- Expression system
- E. coli
- Protein Day
- N-His
- Bioactivity
- ≥2U/mg protein
- Recombinant Streptavidin Protein (APC-AF750)Liquid Validated ? Validated grade — performance confirmed in defined applications before release. Use when you want documented assurance the reagent works as stated. Azide Free ? Azide-free — without sodium azide preservative. Use in conjugations, cell work, or assays where azide is toxic or inhibitory. Suitable for Immunofluorescence(IF) ? IF grade — validated for immunofluorescence with low background staining. Use to localize targets in cells/tissue by fluorescence microscopy. 0.2 mg/mLOut of Stock Item #: S639027View ProductPricing & Pack Sizes
Technical Identifiers
- Species
- Streptomyces avidinii
- Expression system
- E. coli
- Bioactivity
- Binding Biotin
- Synonyms
- SA V1 | SA V2 | strepavidin | Streptavidin V1 | Streptavidin V2 | Streptavidin
- StreptokinaseLyophilized Bioactive ? Bioactive grade — verified to retain biological activity in functional assays. Use when the molecule must be functionally active, not just pure. ActiBioPure™ ? ActiBioPure™ — Aladdin's premier line for bioactive and recombinant products. Use when both high purity and preserved biological activity are required. Native ? Native grade — protein/biomolecule in its natural (non-recombinant, non-denatured) form. Use when native structure and activity are required. High Performance ? High-performance grade with optimized purity and performance characteristics. Use for sensitive analyses where ordinary grades fall short. EnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. from β-hemolytic Streptococcus (Lancefield Group C); ≥2000 U/mg enzyme powderOut of Stock Item #: S710331View ProductPricing & Pack Sizes
Technical Identifiers
- Accession #
- P00779
- Bioactivity
- ≥2000 U/mg enzyme powder
- IUPAC Name
- 4-cyclohexylpyrrolidine-2-carboxylic acid
- SMILES
- C1CCC(CC1)C2CC(NC2)C(=O)O
- InChIKey
- XRZWVSXEDRYQGC-UHFFFAOYSA-N
- InChI
- 1S/C11H19NO2/c13-11(14)10-6-9(7-12-10)8-4-2-1-3-5-8/h8-10,12H,1-7H2,(H,13,14)
- Beta-1,4-galactosyltransferase 1Liquid Bioactive ? Bioactive grade — verified to retain biological activity in functional assays. Use when the molecule must be functionally active, not just pure. Recombinant ? Recombinant — produced via recombinant expression for defined sequence and consistency. Use for reproducible, animal-free proteins of known origin. ActiBioPure™ ? ActiBioPure™ — Aladdin's premier line for bioactive and recombinant products. Use when both high purity and preserved biological activity are required. High Performance ? High-performance grade with optimized purity and performance characteristics. Use for sensitive analyses where ordinary grades fall short. EnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. His Tag ? His tag grade — recombinant protein bearing a His tag for affinity purification/detection. Use to purify, immobilize, or detect the tagged protein. expressed in Baculovirus-BTI-TN-5B1-4 Cells；>2000 U/mg protein；Protein concentration: See COAOut of Stock Item #: B755120View ProductPricing & Pack Sizes
Technical Identifiers
- Species
- Human
- Accession #
- P08037
- Expression system
- Baculovirus-BTI-TN-5B1-4 Cells
- Protein Day
- C-His
- Bioactivity
- >2000 U/mg protein
- Synonyms
- B4GALT1 | GT1 | GTB | CDG2D | GGTB2 | CLDLFIB | B4GAL-T1 | beta4Gal-T1
- Activated Protein C (APC)CAS: 925910-74-3Lyophilized Bioactive ? Bioactive grade — verified to retain biological activity in functional assays. Use when the molecule must be functionally active, not just pure. ActiBioPure™ ? ActiBioPure™ — Aladdin's premier line for bioactive and recombinant products. Use when both high purity and preserved biological activity are required. Native ? Native grade — protein/biomolecule in its natural (non-recombinant, non-denatured) form. Use when native structure and activity are required. High Performance ? High-performance grade with optimized purity and performance characteristics. Use for sensitive analyses where ordinary grades fall short. EnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. from Human plasma; Pre-lyophilization Protein Concentration: See COAOut of Stock Item #: A1440682View ProductPricing & Pack Sizes
Technical Identifiers
- Species
- Human
- Bioactivity
- See COA
- Adenosylhomocysteinase (SAHH)Lyophilized Bioactive ? Bioactive grade — verified to retain biological activity in functional assays. Use when the molecule must be functionally active, not just pure. Recombinant ? Recombinant — produced via recombinant expression for defined sequence and consistency. Use for reproducible, animal-free proteins of known origin. ActiBioPure™ ? ActiBioPure™ — Aladdin's premier line for bioactive and recombinant products. Use when both high purity and preserved biological activity are required. High Performance ? High-performance grade with optimized purity and performance characteristics. Use for sensitive analyses where ordinary grades fall short. EnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. ≥90%(SDS-PAGE) ≥140 U/mg proteinOut of Stock Item #: A1422763View ProductPricing & Pack Sizes
Technical Identifiers
- Accession #
- P23526
- Bioactivity
- ≥140 U/mg protein
- Synonyms
- S-(5′-Adenosyl)-L-homocysteine Hydrolase | S-Adenosyl-L-Homocysteine Hydrolase | adenosylhomocysteinase | adenosylhom...
- Bovin beta-1,4-galactosyltransferase 1 (Y289L)Liquid Bioactive ? Bioactive grade — verified to retain biological activity in functional assays. Use when the molecule must be functionally active, not just pure. Recombinant ? Recombinant — produced via recombinant expression for defined sequence and consistency. Use for reproducible, animal-free proteins of known origin. ActiBioPure™ ? ActiBioPure™ — Aladdin's premier line for bioactive and recombinant products. Use when both high purity and preserved biological activity are required. High Performance ? High-performance grade with optimized purity and performance characteristics. Use for sensitive analyses where ordinary grades fall short. EnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. His Tag ? His tag grade — recombinant protein bearing a His tag for affinity purification/detection. Use to purify, immobilize, or detect the tagged protein. expressed in HEK293；>1000 U/mg protein；Protein concentration: See COAOut of Stock Item #: B1443293View ProductPricing & Pack Sizes
Technical Identifiers
- Species
- Bovine
- Accession #
- P08037
- Expression system
- HEK293
- Protein Day
- C-His
- Bioactivity
- >1000 U/mg protein
- Synonyms
- Bovine B4GALT1 (Y289L) | B4GALT1 | GGTB2
- Betaine homocysteine S-methyltransferaseCAS: 9029-78-1Lyophilized Recombinant ? Recombinant — produced via recombinant expression for defined sequence and consistency. Use for reproducible, animal-free proteins of known origin. EnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. ≥90%(SDS-PAGE)Out of Stock Item #: B1433319View ProductPricing & Pack Sizes
Technical Identifiers
- Accession #
- Q93088
- Synonyms
- Betaine homocysteine S-methyltransferase (BHMT)
- Ferredoxin-NADP reductase (FDXR)CAS: 9029-33-8Lyophilized Bioactive ? Bioactive grade — verified to retain biological activity in functional assays. Use when the molecule must be functionally active, not just pure. Recombinant ? Recombinant — produced via recombinant expression for defined sequence and consistency. Use for reproducible, animal-free proteins of known origin. ActiBioPure™ ? ActiBioPure™ — Aladdin's premier line for bioactive and recombinant products. Use when both high purity and preserved biological activity are required. High Performance ? High-performance grade with optimized purity and performance characteristics. Use for sensitive analyses where ordinary grades fall short. EnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. ≥90%(SDS-PAGE) ≥8 U/mg proteinOut of Stock Item #: F1445242View ProductPricing & Pack Sizes
Technical Identifiers
- Accession #
- P00455
- Bioactivity
- ≥8 U/mg protein
- GlcNAc-1-P uridyltransferase (PmGlmU)Liquid Bioactive ? Bioactive grade — verified to retain biological activity in functional assays. Use when the molecule must be functionally active, not just pure. Recombinant ? Recombinant — produced via recombinant expression for defined sequence and consistency. Use for reproducible, animal-free proteins of known origin. ActiBioPure™ ? ActiBioPure™ — Aladdin's premier line for bioactive and recombinant products. Use when both high purity and preserved biological activity are required. High Performance ? High-performance grade with optimized purity and performance characteristics. Use for sensitive analyses where ordinary grades fall short. EnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. ≥85%(SDS-PAGE) ≥5 U/mg protein; Protein concentration: See COA; expressed in E.coliOut of Stock Item #: G1445241View ProductPricing & Pack Sizes
Technical Identifiers
- Accession #
- Q9CK29
- Expression system
- E. coli
- Protein Day
- C-His
- Bioactivity
- ≥5 U/mg protein
- Homocysteine Methyltransferase (HMT)CAS: 9012-40-2Lyophilized Bioactive ? Bioactive grade — verified to retain biological activity in functional assays. Use when the molecule must be functionally active, not just pure. Recombinant ? Recombinant — produced via recombinant expression for defined sequence and consistency. Use for reproducible, animal-free proteins of known origin. ActiBioPure™ ? ActiBioPure™ — Aladdin's premier line for bioactive and recombinant products. Use when both high purity and preserved biological activity are required. High Performance ? High-performance grade with optimized purity and performance characteristics. Use for sensitive analyses where ordinary grades fall short. EnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. ≥90%(SDS-PAGE) ≥30 U/mg enzyme powderOut of Stock Item #: H1431695View ProductPricing & Pack Sizes
Technical Identifiers
- Accession #
- Q9H2M3
- Bioactivity
- ≥30 U/mg enzyme powder
- Synonyms
- homocysteine S-methyltransferase | BHMT2
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Technical Details Quality & specification info on every product page
Pack Size Options Multiple packaging sizes with pricing access from listing
R&D Use Only Products supplied for research and development use
Frequently Asked Questions
How do I choose between recombinant and native proteins?
Recombinant proteins offer consistent quality, defined sequence, and tag options for purification or detection. Native proteins may have post-translational modifications closer to physiological state. Match source to your assay requirements.
What specifications matter for protein and enzyme research?
Specific activity, purity (≥95% by SDS-PAGE typical), endotoxin level for cell-based assays, storage conditions, tag information (His, GST, FLAG), formulation buffer, and lot-to-lot consistency.
How should proteins be stored to maintain activity?
Most proteins ship on dry ice and require -80°C storage long-term, -20°C for working aliquots. Avoid repeated freeze-thaw cycles — aliquot upon first thaw. Some enzymes have specific buffer requirements for stability.
Are bioactivity-verified enzymes available?
Yes. Enzymes include activity assays in the certificate of analysis. Specific activity is reported in U/mg, with assay conditions specified. Compare lot-specific data for quantitative work.