5 ' phosphorylation in vitro with gamma-32p-atp and t4 phage induced polynucleotide kinase was used to obtain rnaase a and rnaase t1 fingerprints of three plant viroids : potato spindle tuber viroid from tomato ( pstv-tom ) , chrysanthemum stunt viroid from cineraria ( chsv-cin ) and citrus exocortis viroid from gynura aurantiaca ( cev-gyn ) .
C0014241
rnaase
C0018364
rnaase t1