ET-1 (1-15), HUMAN;CYS-SER-CYS-SER-SER-LEU-MET-ASP-LYS-GLU-CYS-VAL-TYR-PHE-CYS;ENDOTHELIN-1 (1-15), HUMAN;CYS-SER-CYS-SER-SER-LEU-MET-ASP-LYS-GLU-CYS-VAL-TYR-PHE-CYS-HIS-LEU-ASP-ILE-ILE-TRP: CSCSSLMDKECVYFCHLDIIW CYS1-CYS15, CYS3-CYS11 ENDOTHELIN-1: ET-1 IS A POTENT VASOCONSTRICTIVE 21-AMINO ACID PEPTIDE PRODUCED BY ENDOTHELIA CELLS. IT ACTS ON ENDOTHELIA CEL