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Brain adenosine 5'-triphosphate-creatine phosphotransferase.


ABSTRACT: 1. The purification of creatine kinase (ATP-creatine phosphotransferase, EC 2.7.3.2) from ox brain by a method that is quicker, simpler and gives much higher yields than other published procedures is described. 2. Stoicheiometric inhibition studies with iodoacetate showed that the enzyme, like that from muscle, has two reactive thiol groups that are essential for enzyme activity. 3. The amino acid sequence around the essential thiol groups was determined and found to be virtually identical with that in creatine kinases from rabbit and ox muscle, and very similar to that found in arginine kinase; the evolutionary significance of this is discussed. 4. The identification of DNS-amino acids on thin layers of silica gel was found to have, in many cases, distinct advantages over that on polyamide layers.

SUBMITTER: Atherton RS 

PROVIDER: S-EPMC1179640 | biostudies-other | 1970 Dec

REPOSITORIES: biostudies-other

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