Complex sentence: SNAREs are small, abundant and mostly membrane-bound proteins that share a common so-called SNARE motif allowing them for reversible assembly into tight, four-helix bundles-- "trans"-SNARE complexes.
Split into simpler sentences: SNAREs are small, abundant and mostly membrane-bound proteins. They share a common so-called SNARE motif allowing them for reversible assembly into tight, four-helix bundles-- "trans"-SNARE complexes.