Hexima Limited is a biotechnology firm focused on the discovery and advancement... Hexima Limited is a biotechnology firm focused on the discovery and advancement of plant-derived proteins and peptides for medical applications in humans. Its primary drug candidate, pezadeftide, a plant defensin, is presently undergoing Phase IIb clinical evaluations in Australia and New Zealand to address fungal toenail infections. The company was established in 1997 and its main operations are situated in Preston, Australia.