Genomic transgene encompassing the Shmt locus containing a E130Q mutation predicted to generate a catalytically dead protein.
ShmtE130Q rescues ShmtA
ShmtE130Q fails to rescue ShmtX238
The lethality of ShmtX238 hemizygous males (derived from heterozygous mothers) cannot be rescued by combination with ShmtE130Q, but it can restore viability of the ShmtA mutant males.