摘要 |
The present invention relates to peptides of the formula Tyr-X-Gly-Phe-X-Xwherein if Xis Gly or L-Ala, Xis independently Leu, Met, Ile, or Val; and Xis independently Asp or Glu; or if Xis D-Ala and Xis Asp, Xis independently Leu, Met, Ile, or Val; or if Xis D-Ala and Xis Glu, Xis independently Met, Ile, or Val; and compositions thereof. |