Deletion of sequence encoding amino acid residues 352-354 (MQR in wild type).
Deletion of codons 351-353 (MQR) in the Vav DH domain.
increased cell number | pupal stage
cone cell | pupal stage | increased number
primary pigment cell | pupal stage | increased number
retina | pupal stage
VavΔMQR mutants show supernumerary cone and primary pigment cells in the pupal retina.