Isolation of Coconut Storage Proteins by Polyacrylamide-Gel Electrophoresis
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Date
2007
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Abstract
By combining sodium dodecyl sulfate (SDS)-gel electrophoresis with a new chilling technique for visualization of protein-SDS complexes in polyacrylamide gels, a process has been developed which will permit the isolation of milligram quantities of pure polypeptides. Using this technique, we have isolated two molecular weight classes of polypeptides from coconut storage globulins and do'- mined the amino acid composition of each. When the two amino acid compos tions were summed on a molar basis, the result agreed reasonably well with the amino acid composition of the starting material with the exception of cystine. Apparently, some contaminant from the polyacrylamide caused its destruction to be accelerated during hydrolysis.