Analysis Note
Agglutination activity is expressed in μg per mL and is determined from serial dilutions in phosphate buffered saline, pH 6.8, of a 1 mg per mL solution. This activity is the lowest concentration to agglutinate a 2% suspension of human erythrocytes after 1 hr incubation at 25 °C.
Biochem/physiol Actions
LcH is not blood group specific. It has an affinity for terminal α-D-mannosyl and α-D-glucosyl residues. LcH is comprised of two isomers, LcH-A (mol. wt. 49,000) and LcH-B (mol. wt. 49,000). LcH-A is mitogenic. Conjugates are prepared from purified lectin.
Preparation Note
Highly purified by affinity chromatography.
Quality
Contains two major bands on electrophoresis corresponding to isolectins LcH-A and LcH-B.