buccal epithelial , gingival fibroblast and white blood cells bound the ha-active fragments , as observed by : ( 1 ) decrease in the ha activity of the sonicated preparation after absorption , ( 2 ) increase in ha activity of the cells used for absorption , ( 3 ) presence of microbial fragments on the cells after absorption detected by fluorescent antibody .
C0016030
fibroblast
C0007634
cells