... example, asparagine to aspartic acid, orglutamine to glutamic acid changes [14]. The a- conotoxinsEpI, PnIA, GIC, GID, AnIA and AnIB contain pairs of asparagine residues [5,10,21,23,24] (Table ... identification of post-translational modificationsIsolation and identificationStandard procedures for identification and isolation of a- conotoxins generally incorporate separations usingreversed-phase ... Theneuronally active a- conotoxins are typically from the a4 /7, a4 /6 and a4 /3 subfamilies (Table 1). Peptides from the mostabundant a4 /7subfamily are typically 16 residues in length and range from...