Functional classification. (A) Functional classification of assembled unigenes based on Gene Ontology (GO) categorization. The results are summarized in three main GO categories: biological process, cellular component and molecular function. The x-axis indicates the subcategories and the y-axis indicates the numbers related to the total GO terms present; the unigene numbers assigned the same GO terms are indicated on the top of the bars. (B) Histogram of Clusters of Orthologous Groups (COG) classification. All unigenes were aligned to the COG database to predict and classify possible functions. Out of 34,029 hits in the NCBI non-redundant (NR) database, 10,234 unigenes were annotated and separated into 24 clusters.