Description

PGA5: Pepsinogen 5, group I (pepsinogen A). Pepsinogens are the inactive precursors of pepsin, the major acid protease found in the stomach. Pepsin is one of the main proteolytic enzymes secreted by the gastric mucosa. Pepsin consists of a single polypeptide chain and arises from its precursor, pepsinogen, by removal of a 41 amino acid segment from the N-terminus. Pepsinogen is synthesized in the stomach lining, and hydrochloric acid, also produced by the gastric mucosa, is necessary to convert the inactive enzyme and to maintain the optimum acidity (pH 1-3) for pepsin function. Pepsin is particularly effective in cleaving peptide bonds involving aromatic amino acids. Pepsin shows extremely broad specificity; although bonds involving phenylalanine and leucine are preferred, many others are also cleaved to some extent. PGA5 is a member of the subfamily A1 within the pepsin family and is the predominant endopeptidase in the gastric juice of vertebrates. PGA5 is inhibited by ovUS-1, a uterine serpin.

References
1. Proc Natl Acad Sci U S A. 2002 Dec 24;99(26):16899-903. 2. Nat Genet. 2004 Jan;36(1):40-5.

Specification
Aliases	Pepsinogen 5; Pepsin A
Entrez GeneID	5222
Swissprot	P0DJD9
clone	2C1
WB Predicted band size	42kDa
Host/Isotype	Mouse IgG1
Antibody Type	Primary antibody
Storage	Store at 4°C short term. Aliquot and store at -20°C long term. Avoid freeze/thaw cycles.
Species Reactivity	Human
Immunogen	Purified recombinant fragment of human PGA5 expressed in E. Coli.
Formulation	Ascitic fluid containing 0.03% sodium azide.

Application
WB	1/500 - 1/2000
IHC	1/200 - 1/1000
ELISA	1/10000