Abstract
The purpose of this study was to develop a fast reversed-phase high-performance liquid chromatography (HPLC) method for monitoring the octreotide PEGylation reaction in order to find optimal conditions for the production of the desired mono-PEGylated octreotide. The fast HPLC method could separate the positional isomers of two mono-PEGylated octreotides, di-PEGylated octreotide, and unmodified octreotide within 4.5 min. The PEGylation pattern was monitored at various pH conditions and molar ratios of reactants to allow optimization of the PEGylation reaction conditions for the production of N-terminally mono-PEGylated octreotide.
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