has_part has part has part external encapsulating structure extracellular matrix GO:0005578 GO:0031012 NIF_Subcellular:nlx_subcell_20090513 Wikipedia:Extracellular_matrix cellular_component A structure lying external to one or more cells, which provides structural support, biochemical or biomechanical cues for cells or tissues. matrisome proteinaceous extracellular matrix APOE COL1A1 COL1A2 DCN LUM SERPINE2 PLAT S100A9 FBLN5 POSTN MMRN1 SOST