1. Recombinant Proteins
  2. Serpin B5/Maspin Protein, Human (375 a.a)

Serpin B5/Maspin Protein, Human (375 a.a)

Cat. No.: HY-P7385
Handling Instructions

Serpin B5/Maspin Protein, Human (375 a.a) could inhibit invasion and motility of mammary tumors. Maspin Protein, Human is also found to be a potent angiogenesis inhibitor.

For research use only. We do not sell to patients.

Protein Expression Service

Recombinant Proteins-MedChemExpress
Size Price Stock Quantity
10 μg $160 In-stock
Estimated Time of Arrival: December 31
50 μg $490 Get quote
100 μg   Get quote  
250 μg   Get quote  

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  • Technical Parameters

  • Properties

  • Documentation

rHuMaspin; Serpin B5; PI-5



E. coli


P36952-1 (M1-P375)

Gene ID


Molecular Weight

Approximately 42.1 kDa

AA Sequence



Lyophilized powder.


Lyophilized after extensive dialysis against PBS.

Endotoxin Level

<0.2 EU/μg, determined by LAL method.


It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O.

Storage & Stability

Stored at -20°C. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer. It is recommended to freeze aliquots at -20°C or -80°C for extended storage.


Room temperature in continental US; may vary elsewhere.


Maspin is a unique member of the serpin family that shares extensive homology with monocyte-neutrophil elastase inhibitor, PAI-2 and other serpins. Maspin has been shown to inhibit invasion and motility of mammary tumors. Tumor transfectants expressing maspin exhibit decreased growth and metastasis in nude mice. Maspin gene expression is not detected in most breast tumors and loss of its expression is correlated with tumor invasiveness. Maspin is also found to be a potent angiogenesis inhibitor. In human breast tissue, maspin seems to be present more in luminal than myoepithelial cells, and it has been suggested that those maspin-expressing myoepithelial cells form a defensive barrier for the progression from ductal carcinoma in situ to more invasive carcinomas. A dispute exists regarding whether maspin acts as a protease inhibitor among biochemists[1].

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The dilution calculator equation

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This equation is commonly abbreviated as: C1V1 = C2V2

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Serpin B5/Maspin Protein, Human (375 a.a)
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