The function of Ensembl gene identifier ENSG00000100280 (AP1B1, adaptor related protein complex 1 subunit beta 1) is as follows. Subunit of clathrin-associated adaptor protein complex 1 that plays a role in protein sorting in the late-Golgi/trans-Golgi network (TGN) and/or endosomes (PubMed:31630791). The AP complexes mediate both the recruitment of clathrin to membranes and the recognition of sorting signals within the cytosolic tails of transmembrane cargo molecules. .