Fig. 3.
Correlation of bioluminescent signal intensity with tumor burden.
(A) Linear correlation (r = 0.989) between bioluminescent signal intensity determined in vivo and tumor burden as determined by FACS analysis of isolated cells from the liver and spleen of tumor-bearing animals (n = 15) 1 to 4 weeks after intravenous injection of 2 × 103 BCL1-gfp/luccells. (B) FACS plots represent analyses of the hematopoietic cell fraction (CD45+) of liver and spleen from an animal with high (▪ in panel A, top row) and one with low tumor load (▴ in panel A, lower row). Numbers represent the percentage of cells within quadrants.