The cubilin protein:amnionless (CUBN:AMN) complex mediates the endocytosis of gastric internal factor complexes with cobalamins (CBLIF:RCbl) into coated vesicles of mucosal cells of the distal ileum. There, the CBLIF:RCbl complex dissociates from CUBN:AMN, which returns to the plasma membrane while CBLIF:RCbl is delivered to lysosomes (Fyfe et al. 2004).
Tanner, SM, Højrup, P, Fyfe, JC, He, Q, Moestrup, SK, de la Chapelle, A, Madsen, M, Christensen, EI
cargo receptor activity of CUBN:AMN:CBLIF:RCbl [plasma membrane]
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