Amino acid replacement: G444R.
Nucleotide substitution: G1330A.
Adults carrying fz8F2.Act5C in a fz21 background have an average of 1.9 +/- 0.6 extra tarsal joints in the leg compared to wild type.
fz8F2.Act5C shows poor rescue of the wing margin phenotype of fz21 fz2C1 double homozygous clones.