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Model of the itinerary of FABP1 from cytosol to the ER membrane. A, 75-kDa complex composed of Sar1, FABP1, Sec13, and SVIP. B, PKCζ phosphorylates a Thr on Sar1b. C, complex is completely disrupted after Sar1b phosphorylation releasing FABP1. D, released FABP1 binds to the ER membrane.
