Medicago AB Products Are Available Worldwide. For Research Use Only. Phaseolus vulgaris lectin P (PHA-P) is isolated from red kidney beans by affinity chromatography. The lectin has a molecular weight of 128 kDa and the purity of the product is decided by SDS electrophoresis. PHA-P is a mixture of isolectins containing L (leuco-agglutinin) and E (erythroagglutinin) subunits. Phaseolus vulgaris lectin is supplied without preservatives as a white to light-pink lyophilized powder. For laboratory use only.