presynaptic endosome membrane obsolete intrinsic component of presynaptic endosome membrane https://github.com/geneontology/go-ontology/issues/23424 true cellular_component GO:0098955 intrinsic to presynaptic endosome membrane This term was obsoleted because it represents protein topology, not a cellular component. OBSOLETE. The component of the presynaptic endosome membrane consisting of the gene products and protein complexes having either part of their peptide sequence embedded in the hydrophobic region of the membrane or some other covalently attached group such as a GPI anchor that is similarly embedded in the membrane.