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. Author manuscript; available in PMC: 2011 Jan 18.
Published in final edited form as: Langmuir. 2009 Sep 1;25(17):10038–10044. doi: 10.1021/la900966h

Figure 1. Adhesive flux measurements on P-selectin for microparticles presenting HuEP immobilized by either chemisorption or by PEG linkages demonstrating PEG length enhances binding under flow conditions.

Figure 1

The flow rate was 1.0 dynes/cm2 wall shear stress and the P- selectin surface site density was set at 100 sites/µm2. Fluxes shown are the result of 2–4 independent measurements. Microparticles were counted as exhibiting transient interactions if their translocation velocity was 3 standard deviations less than the averaged threshold free-stream velocity. Firmly bound microparticles were defined as any microparticles remaining stationary for greater than 60 seconds. * p < 0.025 against the chemisorbed control and against the PEG3400 and PEG10000 microparticles (p = 0.050 for PEG3400. p = 0.0045 for PEG10000).