SYT12 (synaptotagmin 12) is an isoform of synaptotagmin, and is homologous to synaptotagmin-1 and co-localizes with it on synaptic vesicles. However, unlike other synaptotagmins, it does not bind Ca2+. Synaptotagmins contain an N-terminal domain ,usually projecting into the intravesicular space, a...