It also
suggests that in unc - 9 mutants, the native UNC - 7 isoforms expressed in motor neurons (as detected by previous analysis of total UNC - 7 expression) are insufficient to
properly localize AVB - expressed UNC - 7S:: GFP (that is, UNC - 7 in motor neurons does not
substitute for UNC - 9 in localizing AVB - expressed UNC - 7S).