US Patent 9669402 Anionic exchange-hydrophobic mixed mode

Solid supports and ligands are provided for purification of biomolecules by mixed-mode anion exchange-hydrophobic chromatography. Compositions can have the formula Support-(X)—N(R1, R2)—R3-L-Ar, or a salt thereof, wherein: Support is a chromatographic solid support; X is a spacer or absent; R1 and R2 are each selected from hydrogen and an alkyl comprising 1-6 carbons; R3 is an alkyl comprising 1-6 carbons or a cyclo alkyl comprising 1-6 carbons; L is NR4, O, or S; wherein R4 is hydrogen or an alkyl comprising 1-6 carbons; and Ar is an aryl. Methods are also provided for using solid supports and ligands to purify biomolecules such as monomeric antibodies.