Figure 1

The general chemical structure of PE binds covalently to proteins via two thiol bonds to form PBPs and the UV–visible absorbance spectrum (below) of the purified analytical grade (C-PE) from Nostoc sp. Ft salt (MG549320).
The general chemical structure of PE binds covalently to proteins via two thiol bonds to form PBPs and the UV–visible absorbance spectrum (below) of the purified analytical grade (C-PE) from Nostoc sp. Ft salt (MG549320).