Entropy of Zinc insulin

Value 9.3 cal/deg K per amino acid bond (96). Range: not stated, probably around 0.1 cal/deg K per amino acid bond (96).
Organism Cow Bos Taurus
Reference Hutchens JO, Cole AG, Stout JW. Heat capacities from 11 to 305 degrees K and entropies of hydrated and anhydrous bovine zinc insulin and bovine chymotrypsinogen A. Entropy change for formation of peptide bonds. J Biol Chem. 1969 Jan 10 244(1):26-32. abstract 3rd paragraphPubMed ID5813005
Primary Source n.a.
Method Calorimetric. Heat Capacity integrated from 0 K to 298 K
Comments Entropy of formation per amino acid bond compared with average from 5 dipeptides, average 10.2 cal/deg K. Note the absence of a sequence "information" term R ln20 = 6 cal/deg. Likely explanation: Sequence already exists at 0 K, and thus not included in the integration.
Entered by Yagil
ID 102989