The venom proteome of Micrurus dumerilii from Colombia was determined.
Phospholipases A<sub>2sub> are the predominant proteins, among 11 families.
The venom induces a conspicuous myotoxic effect, reproduced by some PLA<sub>2sub>s.
Two PLA<sub>2sub>s and a three-finger toxin reproduce the lethal venom effect.
Anti-Micrurus nigrocinctus antivenom cross-neutralizes M. dumerilii venom.