TABLE 2.

Molecular characterization of some mus301 alleles

Allele no.	Base change (+1ATG)	aa change	Maps to
094	G2101A	G637Q	Fourth exon
422	G3652A		Fifth intron
660	T2185A	M665K	Fourth exon
2255	T1479G	Y455D	Third exon
	G3143T	Q811H	Fifth exon
3198	A3658G		Fifth intron
4875	A1038G	S237G	Second exon
	T1479G	Y455D	Third exon

The 094, 422, and 660 alleles were isolated in the Tübingen mutagenesis (Tearle and Nüsslein-Volhard 1987); the 2255, 3198, and 4875 alleles are from the Zuker EMS collection (Koundakjian et al. 2004).