Momenta Pharmaceuticals, Inc.

Shiming Dong

Cuihua Liu

Xiao-Jin Xu

Jonathan C Lansing

Yanjie Jiang

Guy Dellorusso

Methods of analyzing glatiramer acetate (GA) or a polymeric precursor thereof are provided. The methods can include determining a level of one or more diethylamide-modified amino acids in a sample comprising GA or a polymeric precursor thereof, and selecting at least a portion of the sample based on the assessment of the one or more diethylamide-modified amino acids in the sample.

Evaluation of copolymer diethylamide

The present disclosure provides methods for analyzing structure and/or composition of glycoproteins and glycans of glycoproteins. Such methods can include subjecting a glycoprotein preparation to a condition that removes at least one O-linked glycan from the glycoprotein. Such methods can include subjecting a glycoprotein preparation to a condition that releases an N-glycan from the glycoprotein, e.g., prior to subjecting the glycoprotein to a condition that releases an O-glycan from the glycoprotein.

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North Reading, MA, United States of America

Shiming Dong