Fusion protein amino acids 442-533 (cytoplasmic C2B domain) of mouse Synaptotagmin-3 (also known as Syt3, Synaptotagmin III and SytIII, accession number O35681) Human: 100% identity (92/92 amino acids identical) Rat: 98% identity (91/92 amino acids identical) >70% identity with Synaptotagmin-9, Synaptotagmin-10 and Synaptotagmin-6