Coordinate changes in accumulation of mRNAs. A, The concentration of KR, ACP, ENR, TE, and BC mRNAs in each sample was determined by comparing with hybridization intensity of RNA standards and was used to calculate the number of transcripts. B, The number of KR transcripts at each time point in embryogenesis was plotted against the number of transcripts for ENR (▪), BC (♦), TE (●), and ACP (▴). Values are ×106 per microgram of total RNA. Analysis of the data indicates linear relationship to the number of KR transcripts with r2 values of 0.90 (ENR), 0.88 (BC), 0.92 (TE), and 0.92 (ACP).