Evidence for an Active Carboxyl Group in Pepsin
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چکیده
منابع مشابه
Evidence for a carboxyl group at the active center of bovine carboxypeptidase B.
Bovine carboxypeptidase B has been alkylated at the active center by or-N-bromoacetyl-D-arginine-5-14C. The enzyme was treated at pH 7.0 with a 40-fold molar excess of the reagent. Subsequent fractionation of the reaction mixture on Sephadex G-25 and L-leucyl-D-arginine-Sepharose 4B columns has shown that inactivation is accompanied by incorporation of 1.09 moles of alkylating agent per mole of...
متن کاملThe carboxyl-terminal sequence of porcine pepsin.
The sequence of 27 residues at the carboxyl end of the single polypeptide chain of porcine pepsin has been found to be: -Ile-Leu-Gly-Asp-Val-Phe-Ile-Arg-Gln-Tyr-Tyr-ThrVal-Phe-Asp-Arg-Ala-Asn-Asn-Lys-Val-Gly-Leu-Ala-ProVal-Ala. The peptides from which this sequence has been derived were isolated from tryptic and chymotryptic digests of pepsin and its reduced aminoethylated and trifluoracetylate...
متن کاملChemical modification of carboxyl groups in porcine pepsin.
Carboxyl groups i n porcine pepsin were chemically modified "by the carbodiimide reaction using waterrsoluble l-ethyl-3-(3-dimethylaminopropyl) carbodiimide and amino acid esters as nucleophiles. The modification resulted in profound changes in the a c t i v i t i e s , specificity and.some physicochemical properties of the enzyme. These include* (1) significant decrease in milk clotting activi...
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in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...
15 صفحه اولCarboxyl-terminal sequence of human gastricsin and pepsin.
The tryptic peptides from human pepsin and gastricsin were purified and their sequences were determined. The sequence of 27 residues at the COOH-terminal end of human pepsin was found to be: -Ile-Leu-Gly-Asp-Val-Phe-Ile-ArgGln-Phe-Tyr-Thr-Val-Phe-Asp-Arg-Ala-Asn-Asn-GlnVal-Gly-Leu-Ala-Pro-Val-Ala. The sequence of 19 residues at the COOH-terminal end of human gastricsin was found to be: -Gln-Phe...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1966
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)99878-9