A monoclonal mouse anti-Drosophila synapsin antibody (“SYNORF1”, Developmental Studies Hybridoma Bank) raised against a Drosophila GST-synapsin fusion protein was applied. This antibody reacts with a highly conserved epitope, as it labels neuropil structures over a wide range of arthropod taxa (e.g. [64 (link),65 (link),66 (link),67 (link)]), including arachnid representatives, e.g., spiders [58 (link),68 (link),69 (link)], scorpions [49 (link),70 (link)], and amblypygids (whip spiders) [58 (link)]. This antibody has also been used as a structural marker in the focus species of this contribution, C. cancroides [49 (link)]. In Western blots of brain tissues of Drosophila and the crustacean Coenobita clypeatus identical bands were stained by the synapsin antibody, which suggests that the epitope for SYNORF1 is strongly conserved between Drosophila and Coenobita [64 (link)].
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