Gene Ontology Enrichment Analysis. These figures show the distribution of GO terms exhibiting statistical significant differences (Fisher Exact Test, filtering p-values for multiple testing using False Discovery Rate). The test set consisted in genes containing splicing site close to start codon (distance < = 10 nucleotides). Panels A and B: T. vivax In this case the testing set of short 5'UTR containing genes is composed by 196 sequences. The two panels correspond to different ontology levels (abstraction levels). Panels C and D show the equivalent GO analysis in T. brucei (n = 654).