has part has part has_part characteristic of has modifier synaptic vesicle, recycling pool abnormal synaptic vesicle number abnormal synaptic vesicle recycling pool size 2026-07-17T20:07:32Z abnormal recycling pool of synaptic vesicles number MP:0015058 any anomaly in the quantity of synaptic vesicles belonging to the pool that repopulate vacancies within the readily releasable pool (RRP) of synaptic vesicles, and require more significant stimuli than the RRP in order to release neurotransmitter amount abnormal