Expression profiles of some representative genes within the GO category: extracellular matrix (ID 5578). Expression profile values were extracted from the DNA microarray dataset and normalized to the highest signal value observed among all samples for each gene. This highest signal value was arbitrarily set at 100 and the resulting values are designated the relative signal intensity for the studied gene at the indicated time points. Expression profiles of transforming growth factor-beta1, tgfb1 (AJ007836) were obtained by real-time RT-PCR. tgm2: transglutaminase 2, C polypeptide. col1a1: collagen, type I, alpha 1. col1a2: collagen, type I, alpha 2. fbln1: fibulin 1. sparc: secreted acidic cysteine rich glycoprotein. mmp1a: matrix metalloproteinase 1a. mmp13: matrix metalloproteinase 13.