[ lys13 , lys14 ] apamin , [ lys13 ] apamin and [ lys14 ] apamin , three structural analogs of the bee venom neurotoxin , have been obtained by solid-phase peptide synthesis while an attempt to obtain [ cit13 ] apamin failed , probably at the step of reoxidation of cysteines .
C0004920
bee venom
C0003521
apamin