Primary structure of the calcium ion-transporting adenosine triphosphatase of rabbit skeletal sarcoplasmic reticulum. Soluble peptides from the alpha-chymotryptic digest of the carboxymethylated protein.

The isolation of the soluble peptides from the chymotryptic digest of the calcium-transporting ATPase of rabbit skeletal sarcoplasmic reticulum is described. These peptides were partially sequenced and the information obtained was used to align tryptic peptides of the protein and to confirm sequences within the tryptic peptides. Details of the isolation of some peptides and the amino acid analyses of the peptides are given in Supplementary Publication SUP 50103 (10 pages), which has been deposited with the British Library Lending Division, Boston Spa, Wetherby, West Yorkshire LS23 7BQ, U.K., from whom copies can be obtained on the terms indicated in Biochem. J. (1978) 169, 5.