Pancreatic Ribonuclease: Enzymic and Physiological Properties of a Cross-Linked Dimer

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Science  01 Nov 1974:
Vol. 186, Issue 4162, pp. 444-445
DOI: 10.1126/science.186.4162.444


Monomeric ribonuclease A has very low activity toward typically double-stranded RNA's; the dimeric form of ribonuclease A obtained by cross linking the enzyme by dimethyl suberimidate has more than 78 times the activity of the monomer toward polyadenylate · polyuridylate and 440 times the activity of the monomer toward the double-stranded RNA of a virus from Penicillium chrysogenum. The half-life of the dimer in the bloodstream of the rat is 12 times that of the mononmer.