Complex sentence: Omega-atracotoxin is an insect-specific neurotoxin of Blue mountains funnel-web spiders whose phylogenetic specificity derives from its ability to antagonise insect, but not vertebrate, voltage-gated calcium channels.
Split into simpler sentences: Omega-atracotoxin is an insect-specific neurotoxin produced by the Blue Mountains funnel-web spider. Its phylogenetic specificity derives from its ability to antagonise insect, but not vertebrate, voltage-gated calcium channels.