1 to 2 Sec
||Rat Rattus norvegicus
||Scimemi A, Beato M. Determining the neurotransmitter concentration profile at active synapses. Mol Neurobiol. 2009 Dec40(3):289-306. p.292 right column bottom paragraphPubMed ID19844813
||Aravanis AM, Pyle JL, Tsien RW. Single synaptic vesicles fusing transiently and successively without loss of identity. Nature. 2003 Jun 5 423(6940):643-7.PubMed ID12789339
||At hippocampal synapses, partial fusion (although not
necessarily partial neurotransmitter discharge) initially
emerged as the predominant mode of neurotransmitter
release. This feature has been proposed to speed the recycling time of synaptic vesicles substantially, to 1-2 s (primary source).