Genomic fragment containing the 'SHMT' gene from E. coli (Ecol\glyA) comprising the region between the two alternative start codons, meaning that two proteins, one with and one without the putative mitochondrial presequence, are produced.
Ecol\glyA+tWa is a suppressor of lethal phenotype of ShmtX238
The lethality of ShmtX238 hemizygous males (derived from heterozygous mothers) can be rescued by combination with Ecol\glyA+tWa.