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L2769 Sigma

Lectin from Phaseolus vulgaris (red kidney bean)

Leucoagglutinin PHA-L, lyophilized powder

Synonym: Phaseolus vulgaris agglutinin, PHA



Related Categories Phaseolus vulgaris (Red kidney bean), Cell Biology, Cell Signaling and Neuroscience, Glycan Recognizing Proteins, Glycobiology,
form   lyophilized powder
potency   erythroagglutination activity (Does not agglutinate a 2% suspension of human erythrocytes at 250 μg lectin/ml.)
  ≤1.0 μg/mL leucoagglutination activity
  ≤5 μg/mL mitogenic activity
composition   Protein, ≥60% biuret
impurities   salt, free
storage temp.   2-8°C


Analysis Note

Agglutination activity is expressed in μg/ml and is determined from serial dilutions of a 1 mg/ml solution. This activity is the lowest concentration to agglutinate a suspension of either human erythrocytes (2% in phosphate buffered saline, pH 6.8) or human leukocytes (107 per mL in saline) after 1 hr incubation at 25 °C.

Biochem/physiol Actions

PHA consists of two molecular species, an erythroagglutinin (PHA-E) which has low mitogenic activity and high erythroagglutinin activity, and leucoagglutinin (PHA-L) which has high mitogenic and leucoagglutinating activity, but very low erythroagglutinating activity.
PHA-E is not blood group specific, but agglutination can be inhibited by certain oligosaccharides. PHA-P is the protein form of PHA prior to separation and purification of erythroagglutinin and leucoagglutinin. PHA-M is the mucoprotein form. Conjugates are prepared from the corresponding purified lectins.


2, 5, 10 mg in glass bottle

Preparation Note

Purified by a modification of the method of Leavitt.

Price and Availability

Amplified Detection

Amicon Pro Purification System
Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Certificate of Origin

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