Table 2.

Summary of physical parameters of PEGDA-GSH microspheres.

Parameter		Calculated Value	Observed Value
Particle	Diameter (µm)	-	46±16
	Surface Area (µm2)	-	6,647±804
	Mesh Size (nm)	-	4.6±0.2
GST-GFP	Cross Sectional Area† (µm2/molecule)	1.4×10−5	-
	Capacity§‡ (molecule/microsphere)	4.7×108	9.9±2.5×108

^†Estimated based upon the crystal structure of a GST dimer and predicted structure of the fusion proteins.

^§Estimated from the observed microsphere diameter and estimated cross sectional area of GST-GFP.

^‡Observed value was determined from thrombin release from microspheres.