Livzon Mabpharm Inc.

Jiaming Yang

Baoguo Zhu

Yucai Peng

The present invention provides a method for determining glycosylation and terminal modifications of immunoglobulin during immunoglobulin purification process, which can simultaneously and rapidly determine glycosylation, N-terminal pyroglutamination and C-terminal de-lysination of immunoglobulin, including Step 1) separating immunoglobulin by using cation-exchange resin, and collecting different components in according to retention time; Step 2) denaturing the components of immunoglobulin obtained in step 1) with a denaturant, followed by reducing them with a reducing agent, to separate the light chain and heavy chain; Step 3) separating the light chain and heavy chain of immunoglobulin of step 2) by using reverse phase ultrahigh pressure liquid chromatography; Step 4) measuring the molecular weights of the light chain and heavy chain obtained in step 3) with mass spectrum; and Step 5) analyzing the chromatographic data obtained in step 3) and the mass spectrometric data obtained in step 4) to determine glycosylation and terminal modifications of the immunoglobulin.

Growing community of inventors

Guangdong, China

Jiaming Yang