– Polymerizes chitin, a structural polymer of the cell wall and septum, by transferring the sugar moiety of UDP-GlcNAc to the non-reducing end of the growing chitin polymer. Required for mitotic division septum formation during adverse conditions. CHS1 Protein, S. cerevisiae, Recombinant (His) is expressed in E. coli expression system with N-6xHis tag. The predicted molecular weight is 26.6 kDa and the accession number is P08004.