May act as a neurotoxin. Expressed by the venom duct. Occurs in 2 forms which differ in the post-translational modification of Val-6. In the form conophan mus-V, Val-6 is D-valine. In the form gamma-hydroxyconophan mus-V*, Val-6 is D-4-hydroxyvaline. Both diastereomeric forms of D-hydroxyvaline may be produced. Form conophan mus-V. Form gamma-hydroxyconophan gld-V*. The mature peptide does not contain cysteine residue. Belongs to the conophan family.