Functional classification of differentially expressed genes.

<p>(<b>A</b>). Epinephrine regulated genes. (<b>B</b>). Norepinephrine regulated genes. Gene functions are sorted according to COG categories: C: Energy production and conversion; G: Carbohydrate transport and metabolism; E: Amino acid transport and metabolism; F: Nucleotide transport and metabolism; I: Lipid transport and metabolism; H: Coenzyme transport and metabolism; P: Inorganic ion transport and metabolism; Q: Secondary metabolites biosynthesis, transport and catabolism; D: Cell cycle control, cell division; M: Cell wall/membrane/envelope biogenesis; W: Extracellular structures; U: Intracellular trafficking, secretion, and vesicular transport; T: Signal transduction mechanisms; V: Defense mechanisms; K: Transcription; J: Translation, ribosomal structure and biogenesis; O: Posttranslational modification, protein turnover, chaperones; L: Replication, recombination and repair; R: General function prediction only; S: Function unknown or not in COG classes.