Band assignment of MabSelect SuRe resin with adsorbed mAbs in the spectral region 1700 cm⁻¹–1000 cm⁻¹.

Wavenumber (cm−1)	Band assignment
1688 (shoulder)	Amide I β sheets – protein A
1654 (shoulder)	Amide I α helix – protein A27
1634 (main peak)	Amide I β sheets – IgG425,37
1545 (main peak)	Amide II unordered – IgG427
1540 (shoulder)	Amide II unordered – IgG427
1519 (shoulder)	Amide II – IgG437
1455	CH3δas – IgG425,37
1398	CH3δs – Valine and Alanine – IgG428
1375	Glycosidic linkage – polysaccharide38
1238	Amide III β sheets-IgG425,37
1185	Glycosidic linkage – polysaccharide38
1150	Glycosidic linkage – polysaccharide38
1067	Glycosidic linkage ν – polysaccharide38