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Differences in per mRNA levels in the brains of young and old bees, 7-day-old hive bees and 17- to 24-day-old foragers and precocious and normal age foragers. Means (±SE) of colony means given for laboratory (n = 3) and single-cohort (n = 2) colonies; n = 1 field colony. Representative slot blots in Fig. 3; results of statistical analyses for laboratory and field colonies in Table 1 and for single-cohort colonies in the text.
