# 74: THERMUS THERMOPHILUS MEDIUM ## Main sol. 74 4 g Yeast extract (BD Difco) 8 g Proteose peptone no. 3 (BD Difco) 2 g NaCl 1000 ml Distilled water 1. Adjust pH to 7.0. 2. The original medium description specifies polypeptone, which appears to be no longer available.