A NADP transhydrogenase subtype found in certain types of BACTERIA. This transhydrogenase uses a mechanism that transfers hydrogen to the B side of the NAD(+) or NADP(+) ring structure.

Synonyms: Pyridine Nucleotide Transhydrogenase, B-Specific, Pyridine Nucleotide Transhydrogenase, B Specific, EC 1.6.1.1, NADP Transhydrogenase, B-Specific, NADP Transhydrogenase, B Specific