Agglutination activity is expressed in µg/ml and is determined from serial dilutions in phosphate buffered saline, pH 6.8, of a 1 mg/ml solution. This activity is the lowest concentration to agglutinate a 2% suspension of human blood group A erythrocytes after 1 hr incubation at 25 °C.
WFA is not blood group specific, but has an affinity for N-acetyl-D-galactosamine.
Package size based on active conjugate content
Protein is biotinylated utilizing aminocaproyl spacer.