... suggest that the inhibition of HA production was not caused by direct inhibition of HAS activity.Effect of MU on HAS activity in FM100 cells treatedwith MUThe activity of the HAS in FM100 cells ... n-dodecyl-b-D-maltoside;GlcNAc, N-acetylglucosamine; GlcUA, glucuronic acid; HA, hyaluronan (hyaluronic acid); HABP, hyaluronan binding protein;HAS (Has), hyaluronan synthase; MU, 4-methylumbelliferone; spHAS, S. pyogenes ... thelipid environment of membranes, especially the distribution of different cardiolipin species, surrounding hyaluronan synthase.Keywords: hyaluronan; synthesis; Streptococcus; 4-methyl-umbelliferone;...