Fig. 5.

Scatter plots comparing U251 and U87 gene expression for cells grown in vitro and in vivo as s.c. and i.c. tumors in SCID mice. U251 gene expression and U87 gene expression were directly compared by using scatter blot analysis for tissue culture (A) and s.c. (B) and i.c. (C) growth conditions. Correlation coefficients were calculated for each comparison and are listed in each scatter plot. Points outside the dotted line represent genes with expression levels that differ by >2-fold between the cell lines. Each plot is representative of at least four individual comparisons.