presynaptic endosome membrane obsolete integral component of presynaptic endosome membrane https://github.com/geneontology/go-ontology/issues/23424 true GO:0099067 OBSOLETE. The component of the presynaptic endosome 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. cellular_component