PURIFICATION PROCESS FOR REMOVAL OF TYROSINE SULFATION ANTIBODY VARIANTS; PURIFIED COMPOSITIONS

The present invention relates to purified antibody and antigen-binding fragment compositions that lack sulfated tyrosine on one or more tyrosine residues in the immunoglobulin chains. Purification methods for removing sulfated tyrosine variants from antibody and antigen-binding fragment compositions are also provided. 本发明涉及纯化的抗体和抗原结合片段组合物，其缺乏在免疫球蛋白链的一个或多个酪氨酸残基上的硫酸化酪氨酸。还提供了用于从抗体和抗原结合片段组合物除去硫酸化酪氨酸变体的纯化方法。