Fig. 2

Function annotation and classification of unigenes identified from the transcriptome of F. macclureana. (a) Nr annotation. (b) Clusters of orthologous groups (COG) annotation. Out of 45,516 Nr hits, 13,128 unigenes had a COG classification. A: RNA processing and modification B: Chromatin structure and dynamics C: Energy production and conversion D: Cell cycle control, cell division, chromosome partitioning E: Amino acid transport and metabolism F: Nucleotide transport and metabolism G: Carbohydrate transport and metabolism H: Coenzyme transport and metabolism I: Lipid transport and metabolism J: Translation, ribosomal structure and biogenesis K: Transcription L: Replication, recombination and repair M: Cell wall/membrane/envelope biogenesis N: Cell mobility O: Posttranslational modification, protein turnover, chaperones P: Inorganic ion transport and metabolism Q: Secondary metabolites biosynthesis, transport and metabolism R: General function prediction only S: Function unknown T: Signal transduction mechanism U: Intracellular trafficking, secretion, and vesicular transport V: Defense mechanisms W: Extracellular structures Y: Nuclear structure Z: Cytoskeleton. (c) GO annotation. Results were summarized in three main categories: biological process, cellular component and molecular function. The right and left y-axes indicated the number and percentage of unigenes in a certain category, respectively