WILD-TYPE AND FEEDBACK-RESISTANT PHOSPHORIBOSYL PYROPHOSPHATE SYNTHETASES FROM BACILLUS AMYLOLIQUEFACIENS: PURIFICATION, CHARACTERIZATION, AND APPLICATION TO INCREASE PURINE NUCLEOSIDE PRODUCTION СтатьяZakataeva N.P., Romanenkov D.V., Skripnikova V.S., Vitushkina M.V., Livshits V.A., Kivero A.D., Novikova A.E.Applied Microbiology and Biotechnology. Том 93. 2012. С. 2023-2033