The 5-Methylcytosine & 5-Hydroxymethylcytosine DNA Standard Set is a set of three DNA standards that are linear dsDNA, 897 bp, and have the same sequence. The only difference is that each contains either 100% unmodified cytosines, 5-methylcytosines, or 5-hydroxymethylcytosines. Since the sequence and extent of cytosine modification is known, this DNA standard set is ideal for use in calibration of various applications intended for quantitation of cytosine modifications.