Amino acid replacement: S616L.
C15260292T
S616L | Su(var)3-9-PA
S616L
G to A nucleotide change at the second or third position of the Trp codon leads to a nonsense mutation (exact site of mutation unspecified).
The position effect variegation of the w gene seen in In(1)wm4 flies is almost completely suppressed by one copy of Su(var)3-9311.