SOLID PHASE SYNTHESIS AND SOME HORMONAL ACTIVITIES OF 1-DEAMINO-4-L-VALINE-8-D-HOMOLYSINE-AND 1-DEAMINO-4-L-VALINE-8-D-HOMOARGININE-VASOPRESSIN

Abstract
1-Deamino-4-L-valine-8-DL-homolysine-vasopressin and protected 1-deamino-4-L-valine-8-D-lysine-vasopressin were synthesized by the solid phase method and were then converted into the title compounds (dVDHLVP and dVDHAVP) by tryptic digestion and e-guanidination, respectively. The new hormone analogues exhibit only moderate antidiuretic potency, dVDHLVP 21 units/mg and dVDHA VP 31 units/mg, but since they are essentially devoid of pressor activity (0.01 units/mg) the A/P ratios are very high. In fact, dVDHLVP is the most specific antidiuretic agent in the lysine series known so far.

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