## Abstract Phosphotyrosyl protein phosphatase, purified from the hepatopancreas of __Panaeus japonicus__, is a monomeric enzyme with a relative mass (Mr) of 28,000, as estimated by size‐exclusion FPLC on a Superose^TM^ 12. It has a hydrophobic domain and can be extracted with the detergent CHAPS.
Purification and some properties of alkaline phosphatase from the hepatopancreas of the shrimpPenaeus japonicus (Crustacea: Decapoda)
✍ Scribed by Chuang, Nin-Nin ;Shih, Su-Ling
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 599 KB
- Volume
- 256
- Category
- Article
- ISSN
- 0022-104X
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✦ Synopsis
Abstract
Alkaline phosphatase purified from the hepatopancreas of Penaeus japonicus is stable to heating at 65°C for 5 min. The specific activity of the purified enzyme is 25,000 units/mg of protein. After polyacrylamide gel electrophoresis under denaturing conditions, the purified alkaline phosphatase from shrimp was found to consist of deglycosylated monomers of Mr 40,000 and to retain the attachment sites for both sialic acid and phosphatidylinositol. The alkaline phosphatase from shrimp has an isoelectric point (pI) of 7.6 and becomes more alkaline after the removal of either sialic acid or phosphatidylinositol residues.
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