GCA_000018585.1 P9211_12191 definition putative nicotinamide nucleotide transhydrogenase, subunit beta GCA_000018585.1 P9211_12201 definition putative nicotinamide nucleotide transhydrogenase, subunit alpha 2 (A2) GCA_000018585.1 P9211_12211 definition putative nicotinamide nucleotide transhydrogenase, subunit alpha 1 (A1)