| abstract |
A peptide of the formula I X - Glu - Trp - Y (I) wherein X is H or Gly, Ala, Leu, Ile, Val, NVal, Pro, Tyr, Phe, Trp, D-Ala, D-Leu, D-Ile, D-Val, D-NVal, D-Pro, D-Tyr, D-Phe, D-Trp, .gamma.-aminobutyric acid, .xi.-aminocaproic acid, and Y is Gly, Ala, Leu, Ile, Val, NVal, Pro, Tyr, Phe, Trp, D-Ala, D-Leu, D-Ile, D-Val, D-NVal, D-Pro, D-Tyr, D-Phe, D-Trp, .gamma.-aminobutyric acid, .xi.-aminocaproic acid, -OH, mono- or di-substituted amide (c1-c3) and the uses therefore in modulating the immune system and hemopiesis. |