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In this study, the gene encoding purine nucleoside phosphorylase (PNPase) from Bacillus subtilis W168 was identified, cloned and expressed in Bacillus subtilis AG208. The gene encodes a polypeptide of 233 amino acids with a calculated molecular weight of 25,018 Da. The enzyme activity of the recombinant protein (AGPNP) was analyzed by temperature and pH perturbation difference spectra. Results showed...
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