Cloning and characterisation of novel cystatins from elapid snake venom glands

► Novel cystatins cloned from elapid snake venom glands. ► Widespread, low level expression of cystatin protein observed in venoms. ► Structure and inhibition profile of elapid cystatins consistent with type 2 cystatins. ► Elapid snake venom cystatins novel members of the type 2 cystatin family.