Matrix metalloproteinase (MMP)-2 and MMP-9 are a family of Zn2+ and Ca2+-dependent gelatinase MMPs that regulate muscle development and disease treatment. and they are highly conservative during biological evolution. Despite increasing knowledge of MMP genes. their evolutionary mechanism for functional adaption remains unclear. https://countryscenesaddleryandpetsuppliers.shop/product-category/equestrian-helmets/