Nucleotide substitution: G?A. Mutation at the exon 7 splice acceptor site, resulting in a frameshift after amino acid residue 825.
Indistinguishable from wild type on Southern blot. Immunoblots indicate βPS protein levels are comparable to wild type (within a factor of two).
G8068869A
G to A base change at the splice acceptor. Causes a frameshift after aa residue 825.
Hemizygous embryos derived from heterozygous females often have a "tail up" phenotype.
In embryos derived from mutant germline, at the end of germband retraction the anterior ventral cells of the germband move slightly more anteriorly than corresponding tissue in wild type animals. This phenotype is more extreme than for the simple loss of function mys11. The opening of the stomodeum has moved to the anterior tip of the embryo.
Widespread muscle attachment abnormality in embryo, consequently mobility is impaired.
Variability of morphological and immunostaining phenotypes. Some embryos that are clearly mysxR04 based on head phenotypes had βPS staining at muscle attachment sites.
Heterozygotes with mys8 are lethal.
ifunspecified, mysxR04 has lethal | dominant phenotype