A U.S. Patent for “Compositions Comprising Purified Anti-Abeta Monoclonal Antibodies” was awarded to Genentech on December 3rd, 2019. The present invention is a composition comprising an anti-Abeta monoclonal antibody purified from Chinese hamster ovary host cells, wherein the composition comprises the anti-Abeta antibody and a residual amount of hamster phospholipase B-domain-like 2 (PLBL2), wherein the amount of hamster PLBL2 is less than 20 ng/mg, wherein the anti-Abeta antibody comprises three heavy chain CDRs, CDR-H1 having the amino acid sequence of SEQ ID NO.:23, CDR-H2 having the amino acid sequence. Learn More