Recombinant Factor C Characterization Studies Confirm the Published Structure and Function of Manufactured rFC

Introduction

With the advent of first the EU Pharmacopeial Chapter 2.6.32 (2020) and now the publication of USP Chapter <86> (2024) on the use of recombinant Factor C assays, the manufactured products supplied must meet customer confidence expectations in terms of r-Protein characterization. Both current and historical QC characterization tests are described here for ENDOZYME II. The known and therefore expected structure of the complex molecule is shown below from: Shibata et al. 2018 “Intermolecular autocatalytic activation of serine protease zymogen factor C through an active transition state responding to lipopolysaccharide” (1).