Lectin from Phaseolus vulgaris (red kidney bean), Phytohemagglutinin PHA-P, lyophilized powder

Descriptions

Analysis Note

Agglutination activity is expressed in mg/ml and is determined from serial dilutions of a 1 mg/ml solution. This activity is the lowest concentration to agglutinate a suspension of 2% human erythrocytes in phosphate buffered saline, pH?6.8, after 1 hr incubation at 25?°C. Mitogenic activity is determined by BrdU incorporation in HeLa cell cultures.

Application

Lectin from Phaseolus vulgaris (red kidney bean) has been used in phytohemagglutinin (PHA) assay and during assessment of cellular and humoral immunity.

It has also been used as an antigen to measure in vivo T-cell-mediated immune responsiveness.

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.

General description

Phytohaemagglutinin (PHA, or phytohemagglutinin) is a lectin found in plants (esp. in legumes). It is obtained from Phaseolus vulgaris (red kidney beans) and acts as a mitogen in human leucocyte culture.

PHAs are carbohydrate-binding proteins. There are several types of PHAs identified, predominantly in leguminous plants.

Packaging

5 mg in glass bottle

25, 50 mg in poly bottle

Specifications

No detailed specifications are available for this product.

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Code	Description	Quality Level	Manufacturer	Storage Temp.	Impurities	Form	Price	Quantity
3587108	Lectin from Phaseolus vulgaris (red kidney bean), Phytohemagglutinin PHA-P, lyophilized powder	300	SIGMA-ALDRICH	2-8°C	salt, free	lyophilized powder	£109.76 (exc VAT) per 25MG	- +
3587109	Lectin from Phaseolus vulgaris (red kidney bean), Phytohemagglutinin PHA-P, lyophilized powder	300	SIGMA-ALDRICH	2-8°C	salt, free	lyophilized powder	£193.61 (exc VAT) per 50MG	- +
3587110	Lectin from Phaseolus vulgaris (red kidney bean), Phytohemagglutinin PHA-P, lyophilized powder	300	SIGMA-ALDRICH	2-8°C	salt, free	lyophilized powder	£39.42 (exc VAT) per 5MG	- +