Synonyms:BET5, BET5 homolog, Multiple myeloma protein 2, MUM 2, MUM2, TRAPPC1 Background:TRAPPC1, also known as BET5 or MUM2, is a part of the multisubunit TRAPP(transport protein particle) complexes which are involved in the tethering process at different trafficking steps of vesicle transport(PMID: 16828797). TRAPPC1 may play a role in vesicular transport from endoplasmic reticulum to Golgi(PMID: 10582700).