2.7.1.73	metabolism	comparison of growth characteristics including intracellular protein levels, RNA content, and nucleotide pool sizes between the extreme halophile Halobacterium halobium and the moderate halophile Haloferax volcanii. The differences in the metabolism of purine bases and nucleosides and the sensitivity to purine analogs between the two halobacteria are reflected in differences in purine enzyme levels	734059	
2.7.1.73	metabolism	in the salvage pathway, guanosine and inosine are directly phosphorylated to GMP and IMP, respectively, by guanosine-inosine kinase, or guanosine is indirectly converted to GMP through serial phosphorolysis and phosphorylation catalyzed by purine nucleoside phosphorylase and guanine phosphoribosyltransferase, respectively, pathway, overview	721378