 This fragment is then proteolytically processed into several smaller fragments that have been isolated in humans composed of 13 and 14 amino acids (kisspeptin-13 and kisspeptin-14 respectively).Each of these fragments has a similar conserved region at the C-terminal sequence consisting of ten amino acids.Specifically, positions 2, 4, 6, 7, 8, and 9 in this region are completely conserved where any variation seen is due to random mutations.