HA binding by permeabilized mobilized blood HPCs is inhibited by anti-RHAMM and by anti-CD44. Mobilized blood HPCs were treated with MoAb before HA binding as in Fig 1. The relative decrease was calculated as the MFI of HA binding after pretreatment with anti-RHAMM or anti-CD44 divided by the MFI after anti-β1 integrin. For all 3 samples, the same pattern of MoAb inhibition was observed.