Mean expression profiles of acute phase genes. (a) Expression profile of the signal transducer and activator of transcription (Stat)3 transcript (red), as compared with CAAT-enhancer binding protein (c/ebp)β (dark blue) and c/ebpδ (light blue) from the microarray. (b) The mean expression profiles of 12 class I acute phase response genes (cI APR; red) and five class II acute phase response genes (cII APR; blue). Y axes indicate mean normalized intensity, and X axes indicate the developmental time points in days. Error bars represent standard error of the mean. Gest, gestation; Lac, Lactation; Inv, involution.