<p>This entry represents the RihB ribonucleoside hydrolases, which are homologous to the RihA and RihC hydrolases. RihB hydrolyses cytidine and uridine to ribose and cytosine or uracil respectively; however in contrast to RihA, RihB displays a preference for cytidine [<cite idref="PUB00053958"/>].</p> Pyrimidine-specific ribonucleoside hydrolase RihB