Reconstitute at 0.2 mg/mL in sterile PBS. Cripto (TDGF1) is a GPI-anchored cell membrane proetin involved in Nodal signaling. Cell associated TDGF1 acts as a a Nodeal coreceptor in cis. Shedding of TDGF1 by TMEM8A modulated Nodal signaling by allowing so