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Fig. 3. The phosphomimicking mutant LIN-12(S/TtoD)::GFP. (A,B) LIN-12(S/TtoD)::GFP
is downregulated normally in the 1° lineage. Enhanced internalization and
increased accumulation in endocytic puncta (white arrowheads) and the
basolateral plasma membrane (yellow arrowheads) is seen in the 2° lineage.
(C,D) Loss of sur-2 activity prevents LIN-12(S/TtoD)::GFP
downregulation in the 1° lineage and causes accumulation in the
basolateral plasma membrane (yellow arrowheads). (E) Quantification of
LIN-12(S/TtoD)::GFP downregulation. Scale bars: 10 µm.