Molecular hydrogen production by nitrogenase of Rhodobacter sphaeroides and by Fe-only hydrogenase of Rhodospirillum rubrum

摘要

The genes coding for two PII-like proteins, GlnB and GlnK, which play key roles in repressing the nitrogenase expression in the presence of ammonium ion, were interrupted from the chromosome of Rhodobacter sphaeroides. The glnB-glnK mutant exhibits the le