P7125
Pepsin from porcine gastric mucosa
powder, ≥400 units/mg protein
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biological source
Porcine gastric mucosa
Quality Level
form
powder
specific activity
≥400 units/mg protein
mol wt
35 kDa
solubility
10 mM HCl: soluble 1.0 mg/mL, clear to faintly turbid, colorless
UniProt accession no.
storage temp.
2-8°C
Gene Information
pig ... LOC396892(396892)
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Application
Pepsin is a peptidase used to digest proteins and is commonly used in the preparation of Fab fragments from antibodies. Pepsin, from porcine gastric mucosa, has been used to hydrolyze dry cervical samples in mice. Product P7125 is provided in powder form. Product P7125 has been used to denature DNA from kidney cells and to digest pathology samples from anal canal carcinomas (ACC) biopsies prior to EGFR staining.
The enzyme from Sigma has been used to obtain total vitamin B12 content in food products prior using immunoaffinity columns It has also been used to digest minced soft tissue of snails prior to the isolation of the third stage larvae (L3).
Pepsin cleavage can be used to produce F(ab′)2 fragments of antibodies. pepsin at www.sigma-aldrich.com/enzymeexplorer.
Biochem/physiol Actions
It does not cleave at valine, alanine, or glycine linkages. Z-L-tyrosyl-L-phenylalanine, Z-L-glutamyl-L-tyrosine, or Z-L-methionyl-L-tyrosine may be used as substrates for pepsin digestion. Pepsin is inhibited by several phenylalanine-containing peptides.
Pepsin hydrolyzes peptide bonds, not amide or ester linkages. Pepsin cleaves peptides with an aromatic acid on either side of the peptide bond. Sulfur-containing amino acids increase susceptibility to hydrolysis when they are close to the peptide bond. Pepsin preferentially cleaves at the carboxyl side of phenylalanine and leucine and at the carboxyl side of glutamic acid residues. Cleaves Phe-Val, Gln-His, Glu-Ala, Ala-Leu, Leu-Tyr, Tyr-Leu, Gly-Phe, Phe-Phe and Phe-Tyr bonds in the β chain of insulin
Pepsin is the major proteolytic enzyme produced in the stomach. It digests proteins through the cleavage of interior peptide linkages.
Pepsin is the major proteolytic enzyme produced in the stomach. It digests proteins through the cleavage of interior peptide linkages.
Preferential cleavage: hydrophobic and aromatic residues in P1 and P1′ postitions. Cleaves Phe-Val, Gln-His, Glu-Ala, Ala-Leu, Leu-Tyr, Tyr-Leu, Gly-Phe, Phe-Phe and Phe-Tyr bonds in the β chain of insulin
Unit Definition
One unit will produce a ΔA280 of 0.001 per min at pH 2.0 at 37 °C, measured as TCA-soluble products using hemoglobin as substrate. (Final volume = 16 mL. Light path = 1 cm.)
Analysis Note
Optimum pH is 2-4. Active in 4 M urea and 3 M guanidine HCl. Stable at 60 °C. Pepsin is irreversibly inactivated at pH 8.0 - 8.5.
Protein determined by E1%/280
Other Notes
View more information on pepsin at www.sigma-aldrich.com/enzymeexplorer.
inhibitor
Product No.
Description
Pricing
signalword
Danger
hcodes
Hazard Classifications
Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
wgk_germany
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
dust mask type N95 (US), Eyeshields, Faceshields, Gloves
Certificates of Analysis (COA)
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Erli Neuhauss et al.
Memorias do Instituto Oswaldo Cruz, 102(1), 49-52 (2007-02-13)
Introduction of Achatina fulica in Brazil has led to serious concerns about its role as vector for metaIylid worms: AngioIylus costaricensis and A. cantonensis. Experimental infection with both parasites was performed to evaluate the potential risk for their transmission by
J Dahle et al.
Proceedings of the National Academy of Sciences of the United States of America, 94(5), 1773-1778 (1997-03-04)
Microcolonies of 2-8 Madison-Darby canine kidney cells (MDCK II) and Chinese hamster lung fibroblasts (V79) cells were incubated with the photosensitizer Photofrin and exposed to light, and the resulting number of dead cells per colony was determined. The distribution of
Lyly H Lê et al.
American journal of clinical pathology, 124(1), 20-23 (2005-06-01)
Most anal canal carcinomas (ACCs) are squamous cell carcinomas (SCCs). SCCs in other tumor sites strongly express epidermal growth factor receptors (EGFRs), the inhibition of which might result in favorable changes in tumor growth. A review of the published scientific
Xu-Dong Kong et al.
Nature biomedical engineering, 4(5), 560-571 (2020-05-13)
The oral administration of peptide drugs is hampered by their metabolic instability and limited intestinal uptake. Here, we describe a method for the generation of small target-specific peptides (less than 1,600 Da in size) that resist gastrointestinal proteases. By using
Enzymes of Molecular Biology
Sweeney, P.J., and Walker, J.M.
Methods in Molecular Biology, 290-291 (1993)
Protocols
This procedure may be used for determination of Pepsin activity using hemoglobin as the substrate. It is a spectrophotometric stop rate determination.
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