5-Methylcytosine DNA Standard (2 µg) (D5405-2) by Zymo Research — fully synthetic 897 bp dsDNA with 100% 5-mC at all cytosines. 50 ng/µl, 40 µl (2 µg total) in modified TE buffer. For bisulfite conversion controls, MeDIP, LC/MS, and HPLC assays.