has_part has part has part has plasma membrane part <http://purl.obolibrary.org/obo/BFO_0000051> some (<http://purl.obolibrary.org/obo/GO_0005886> and <http://purl.obolibrary.org/obo/BFO_0000051> some ?Y) Every B cell[CL_0000236] has plasma membrane part some immunoglobulin complex[GO_0019814] Holds between a cell c and a protein complex or protein p if and only if that cell has as part a plasma_membrane[GO:0005886], and that plasma membrane has p as part. material anatomical entity material anatomical entity pending final vetting axiom holds for all times