Constitution of leguminous seeds: The microscopic structure of proteins isolated from Phaseolus beans

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Abstract
Proteins were isolated from citric acid and sodium hydroxide extracts of Phaseolus beans. Examination of the proteins under the light microscope revealed that they had different micro‐structures. Bipyramidal crystalline and spheroidal protein were obtained from the citric acid extracts of the white kidney bean, the navy bean and the baby lima bean. Cubical crystalline, rosette‐type and needle‐like structures were isolated from the navy bean under certain conditions. Analysis of the proteins revealed the presence of phytic acid and carbohydrate material. There was some indication that neither of these two materials affect the microscopic structure of the proteins.