MLL1/WAR complex of human MLL1 (GenBank Accession No. NM_005933), a.a. 3745-end with N-terminal His-tag and MW= 27 kDa, human Ash2L (GenBank Accession No. NM_001105214), a.a. 2-end with N-terminal His-tag and MW= 61 kDa, and human RbBP5 (GenBank Accession No. NM_005057), a.a. 2-end with N-terminal His-tag and MW= 60 kDa, individually expressed in an E. coli expression system, and human WDR5 (GenBank Accession No. NM_017588), a.a. 2-end with N-terminal His-tag and MW= 37.4 kDa expressed in a baculovirus Sf9 expression system.