Top cofit genes for b2307 from Escherichia coli BW25113
hisM: histidine/lysine/arginine/ornithine transporter subunit (NCBI)
SEED: Histidine ABC transporter, permease protein HisM (TC 3.A.1.3.1)
KEGG: histidine transport system permease protein
Or look for negative cofitness