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. 1999 Mar 16;96(6):3104–3107. doi: 10.1073/pnas.96.6.3104

Figure 2.

Figure 2

Normalized 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide absorbances of chondrocytes after exposure to 1.5 mW/cm2 UVA light and HPK (% wt/vol). Control cells were not exposed to initiator or light, HPK control (0.036% HPK) was not exposed to light, and UVA control cells were exposed to light only.