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Shear-rate-dependent viscosity of the CACP-hSF, BSF, ET-BSF, UHA, and UHA with added lubricin measured in the rheometer. After addition of lubricin, the zero-shear viscosity of UHA decreased considerably. An increase in zero-shear viscosity was also noted in BSF after digestion with trypsin. The onset of power-law behavior (between arrows) at greater shear rates in the CACP-hSF sample may be attributable to a wider range in the molecular weight distributions of HA.
