PREDICTION OF RELATIVE POLYPEPTIDE SOLUBILITY BY POLYETHYLENE GLYCOL PRECIPITATION

摘要

A method is described for predicting the relative solubility of a polypeptide using polyethylene glycol (PEG) based volume exclusion precipitation. Different polypeptides can be tested for their solubilities relative to each other or relative to a reference. A single polypeptide can be tested for its relative solubility under different experimental conditions. The solubility determinations can be made by comparison based on graphs plotting the log solubility of the polypeptide against a range of PEG concentrations. Additionally, a method is provided for the high throughput visual or automated screening of multiple polypeptides for relative solubility differences, in a method that can omit the step of measuring the actual solubility or actual amount of precipitation of each sample at each PEG concentration.