Updated annotation (from data): 3-hydroxy-2-methylbutyryl-CoA dehydrogenase IvdG (EC:1.1.1.178) Rationale: Important for utilization of L-isoleucine as a carbon or nitrogen source. SO1683 is expected to be the 3-hydroxy-2-methylbutyryl-CoA dehydrogenase for isoleucine degradation (PMC2612455), and this is confirmed by its mutants' phenotype. (Also see data from an independent set of transposon mutants in PMC3219624.) Mutants in SO1683 have many other phenotypes which are not explained. Original annotation: 3-oxoacyl-(acyl-carrier-protein) reductase, putative (NCBI ptt file) Type 1: Protein-coding gene Located on scaffold 139, + strand, nucleotides 1,770,317 to 1,771,075 See nucleotide sequence around SO1683 or for all of scaffold 139