Effect of EGCG on gene expression in myeloma cells. Gene expression profile was analyzed in untreated or EGCG-treated (10 μM for 24 hours) MM cells using HG-U133A gene arrays (Affymetrix). Fold change in the expression in EGCG-treated cells relative to expression in untreated INA6 cells is shown by the intensity of red (induction) or blue (suppression) colors.