Amino acid replacement: S845R.
Nucleotide substitution: T?A.
T17138451A
T?A
S845R | mei-218-PB; S845R | mei-218-PC; S845R | mei-218-PD; S845R | mei-218-PE
S845R
Homozygous females show 37.7% X chromosome nondisjunction and 31.7% 4th chromosome nondisjunction.