... proteinsinvolved in the trafficking of the receptor, includingc-Cbl, could account for its intracellular retention. Bycontrast, TDI mutations in the ECD or disruption of the termination codon induced ... mutations affecting the receptor in at least two different ways. Conversion of Lys650 into methionine in the TK2 domain induceshyperphosphorylation and marked intracellular retent-ion of the mutant ... determined by western blot, were comparable in the two cell lines, indicating that the presence of elevatedlevels of the VnR did not affect the pathways studied in these experiments. ATDC5 cells...