Immunogen sequence: RIIPGFMCQG GDFTRHNGTG GKSIYGEKFE DENFILKHTG PGILSMANAG PNTNGSQFFI CTAKTEWLDG KHVVFGKVKE GMNIVEAMER FGSRNGKTSK. Immunophilins are a family of soluble cytosolic receptors capable of binding to one of two major immunosuppressant agents -