Amino acid replacement: C37S.
Nucleotide substitution: T173A.
T26029544A
T173A
C37S | E(spl)m5-HLH-PA
C37S
E(spl)m5-HLHC37S/Df(3R)BSC751 (but not E(spl)m5-HLHC37S/E(spl)m5-HLHK72stop or E(spl)m5-HLHC37S/E(spl)m5-HLHQ127stop) mutant embryos display a significant increase in the number of Ap neurons, and E(spl)m5-HLHC37S/Df(3R)BSC751 mutants display a significant increase in the number of EL neurons, as compared with controls.