Rb spaeroides

In this study, we examined a newly isolated Rb. spaeroides KD131 strain and a mutant derived from Rb. spaeroides KD131 by internal deletion of Hup SL and Phb C genes on their properties of growth and hydrogen evolution using different substrates and under different culture conditions. 

In RCs from R. viridis, Rb, spaeroides, Rb. capsulatus and Rhodospi-rillutn rubrum, the rate constant kq for Reaction (1) is approximately 5-10 s at 300K [2,9,11-14] and increases by a factor of 2 between 300K and 80K, indicating an activationless process [17-22]. In general, the elec-... 

Experimental fsec kinetic data on mutagenetically altered RCs of Rb,spaeroides are expected to infer on functional and structural importance of specific amino acid residues. The exchange of the polar tyrosine M208 (Tyr) residue by the nonpolar phenylalanine (Phe) in Rb.sphaeroides results in the slowing of the primary ET rate to l/r = (16psec) l °l, as compared with l/r = (3.5 0.4psec)" for the native This observation can be... 

Polyhydroxyalkanoates (PHAs), also known as microbial polyesters , or bacterial plastics are biosynthetic, biocomapatible, and biodegradable thermoplastics. They are bacterial storage polymers produced by various microorganisms (e.g., A.eutrophus, P.oleovorans, R.rubrum, Rb.spaeroides) in response to nutrient limitation occuring in the presence of an excess of carbon (see Chapters 9 and 10), and function as intracellular reserves of carbon and energy as well as ion sinks. 

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