Kisspeptin peptides play major roles in the regulation of reproduction and puberty onset in mammals. While most mammals only have one kisspeptin gene. other jawed vertebrates present two or three genes. Recent data also revealed the presence of two genes in lampreys (jawless vertebrates). https://www.bekindtopets.com/flash-find-Purina-Exclusive-Puppy-Food-Chicken-Brown-Rice-super-sale/