Laminin (Laminin subunit alpha-1) is a comple, Xenopus/Amphibian, glycoprotein, consisting of three different polypeptide chains (alpha, beta, gamma), which are bound to each other by disulfide bonds into a cross-shaped molecule comprising one long and three short arms with globules at each end. Alpha-1 is a subunit of laminin-1 (laminin-111 or EHS laminin) and laminin-3 (laminin-121 or S-laminin). Laminin is thought to mediate the attachment,Mouse,igration and organization of cells into tissues during embryonic development by interacting with other e, Xenopus/Amphibian,tracellular matri, Xenopus/Amphibian, components.