SAN DIEGO, Sept. 15, 2025 /PRNewswire/ -- Abzena, the leading end-to-end integrated CDMO for complex biologics and bioconjugates, announced the expansion of its AbZelectPRO™ cell line development (CLD) platform with the launch of two next-generation Glutamine Synthetase ("GS") knockout CHO-K1 expression systems, including a double knockout ADCC+ platform for afucosylated proteins. The addition of the new GS knockout cell lines will further enhance speed, scalability, and flexibility for biopharm