Deletion extending from -132bp to +381bp relative to the first nucleotide of the nvy coding sequence (the 'A' of the ATG start codon of nvy-RB and nvy-RC).
A 513bp deletion that removes the first coding exon of isoforms nvy-RB and nvy-RC. The flanking sequences of the deletion are 5'acttgatgttttcgtctatc..deletion..aataggcattgttaggatta-3'.