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Merck
CN

L8629

Lectin from Phaseolus vulgaris (red kidney bean)

Erythroagglutinin PHA-E

Synonym(s):

Phaseolus vulgaris agglutinin, PHA

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About This Item

NACRES:
NA.32
UNSPSC Code:
12352202
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Quality Segment

form

salt-free, lyophilized powder

potency

<10 μg per mL agglutination activity (with erythryocytes)

composition

Protein, ≥80% biuret

storage temp.

2-8°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.

Preparation Note

Purified by a modification of the method of Leavitt.

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.
Tested for leucoagglutination.


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Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)



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