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. Author manuscript; available in PMC: 2011 Jun 1.
Published in final edited form as: Biomaterials. 2010 Mar 7;31(16):4484–4491. doi: 10.1016/j.biomaterials.2010.02.036

Fig. 1.

Fig. 1

Enzymatic activity of apyrase, measured as ATPase activity. Apyrase (AP) at four concentrations and human serum albumin (HSA) were immobilized in mitrotiter wells. ATP was added to the wells and incubated for 60 (ATP =1 μM, Fig. 1A) or 90 min (10 μM, Fig. 1B), respectively. The remaining ATP was measured using a luciferase-based ATP kit.