mildly significantP = 0.03
Furthermore, when we compared mean population levels of mRNA to protein (values are listed in Table S3 ), there was a mildly significant correlation reminiscent of transcriptome-proteome comparisons ( Fig. 4B , black regression line, P = 0.03). 49 However, we found very strong correlations between mRNA and protein abundances when we grouped the data by constitutive or periodic mRNA ( Fig. 4B , blue regression line P = 1.8E-4 and red regression line P = 1.4E-3, respectively).