spine apparatus membrane obsolete integral component of spine apparatus membrane https://github.com/geneontology/go-ontology/issues/23424 true GO:0099065 cellular_component OBSOLETE. The component of the spine apparatus membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane. This term was obsoleted because it represents protein topology, not a cellular component.