
redBS-Seq relies on the chemical reduction of f5C to hm5C by NaBH4. The hm5C is then detected in the same manner as m5C. In MAB-seq, 5fC is first reduced by NaBH4 to 5hmC. Owing to the combination of NaBH4 reduction with M.SssI treatment, 5caC is sequenced as T after bisulfite conversion, whereas C, 5mC, 5hmC and 5fC are read as C.