Activity Assay: 1. Mix equal volumes of human blood and Alsever's solution (pH 7.0). (Alsever's solution: NaCl 0.42g, Sodium citric acid 0.8g, Citric acid 0.055g, D-glucose 2.05g in DW100 ml).2. Centrifuge at 15000rpm for 10 minutes and wash 4 times with PBS.3. Dilute packed cells in a 0.5mg/ml trypsin-EDTA solution to give 4% red cell suspension.4. Incubate for 1 hour at 37°C and wash 4 times with PBS.5. Dilute packed cells in PBS to give a 4% red cell suspension.6. Load 50 ul of 0.5%BSA-in-0.15M-NaCl solution and 25 ul of 4%-Red-Cell-in-PBS in U shaped wells.7. Add 25 ul of serial diluted galectin protein in PBS to each well plate (Round bottom 96 well plate).8. Incubate for 30 minutes at room temperature to observe visible agglutination.

Store at 4°C if entire vial will be used within 2-4 weeks. Store, frozen at -20°C for longer periods of time. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).Avoid multiple freeze-thaw cycles.