Peptides that induce ovulation or fertilization

摘要

A peptide comprising an amino acid sequence represented by Formula I: CCXXXCXXXXXXXXX (I) (X represents any amino acid residue other than a cysteine residue), and Formula II: CXXXXXXXXXXXX (II) (X is the same as described above. And a heterodimeric peptide having an ovulation or fertilization-inducing activity in an invertebrate belonging to the class of sea cucumber.