SEARCH Articles Figures Tables 10- cytosin Activating groups Active groups Biotin modification Biotin-hydrazide cytosine modification Biotin-hydrazide groups Bisulfite Bisulfite Activation of Cytosine Cytosine Group Activation Group modification Hydrazide modification Hydrazides biotin-hydrazide Modification biotin-hydrazide Modification hydrazides Of -biotin Of hydrazide