Phaseolus vulgaris agglutinin is the name ascribed to a family of lectins, each of which consists of four subunits. There are two different types of subunits. One appears to be involved primarily in red cell agglutination and has been designated the “E” subunit (for erythroagglutinin). The other type is involved in lymphocyte agglutination and mitogenic activity and has been termed the “L” subunit (for leucoagglutinin). These subunits combine to produce five isolectins. PHA-L, with four “L” type subunits, does not agglutinate red cell but is a potent mitogen.
Biotinylated PHA-L has an appropriate number of biotins bound to provide the optimum staining characteristics for this lectin. This conjugate is supplied essentially free of unconjugated biotins and is preserved with sodium azide.
| Unit Size | 2 mg |
|---|---|
| Applications | Immunohistochemistry / Immunocytochemistry, Immunofluorescence, Blotting Applications, Elispot, ELISAs, Glycobiology |
| Recommended Usage | For most applications we recommend a freshly prepared working solution of 5-20 µg/ml in the below buffer. |
| Recommended Storage | 2-8 °C |
| Solution | 10 mM HEPES, pH 7.5, 0.15 M NaCl, 0.08% sodium azide, 0.1 mM CaCl2 |
| Concentration | 2 mg active conjugate/ml |
| Conjugate | Biotinylated |
| Sugar Specificity | Galactose, Complex Structures |
From our experience we have found that some lectins require Ca++ to be present for optimal binding activity. We suggest using calcium chloride (CaCl2) to fortify working solutions and ensure a minimum level of Ca++ is met. This may be particularly pertinent if using phosphate based buffers as diluents and storage solutions.
PHA-L, with four L type subunits, does not agglutinate red cells but is a potent mitogen. The other three isolectins, designated E3L1, E2L2, and E1L3, have erythroagglutinating and mitogenic activities proportional to the number of respective E or L subunits. We have termed the mixture of the five isolectins PHA (E+L).
This biotinylated lectin is an ideal intermediate for examining glycoconjugates using the Biotin-Avidin/Streptavidin System. First the biotinylated lectin is added, followed by the VECTASTAIN ABC Reagent, Avidin D conjugate, or streptavidin derivative.
Note: Do not use a biotinylated PHA-L to perform anterograde neuronal tracing. Only the unconjugated PHA-L (catalog # L-1110) is compatible for this application.
Elution: 100 mM acetic acid
Applicable patents and legal notices are available at legal notices.
Stay in the Loop. Join Our Online Community
Products
Ordering
About Us
Application
Resources
©Vector Laboratories, Inc. 2024 All Rights Reserved.
How do I Request a Quote?
To request a quote for products:
