Complex of active human DNA methyl-transferase 3A (DNMT3A), GenBank Accession No. NM_175629, a.a 623-912(end) with N-terminal His-tag, MW=34 kDa, and DNMT3L (GenBank Accession No. NM_013369), a.a. 160-387(end), with an N-terminal GST-tag, MW = 52 kDa, co-expressed in a baculovirus-infected Sf9 cell expression system.