Rabbit Anti-Human S100A9 monoclonal antibody for WB, ICC/IF, IHC. The family of EF-hand type Ca-binding proteins includes Calbindin (previously designated vitamin D-dependent Ca-binding protein), S-100? and ?, Calgranulin A (also designated MRP8), Calgranulin B (also designated MRP14) and Calgranulin C (S-100 like protein), and the parvalbumin family members, including parvalbumin ? and parvalbumin ? (also designated oncomodulin). Calbindin, S-100 proteins and parvalbumin proteins are each expressed in neural tissues. In addition, S-100? and ? are present in a variety of other tissues, and Calbindin is present in intestine and kidney. Parvalbumin ? is also found in fast-contracting/relaxing skeletal muscle fibers and parvalbumin ? is found in many tumor tissues as well as in the organ of Corti. Calbindin, S-100 proteins and parvalbulmins have all been detected in leydig cells and testis. These proteins are thought to play a role in hormone production and spermatogenesis. Calgranulin is expressed in macrophages and epithelial cells.