KEGG Orthology-Based Annotation System (KOBAS) annotates sequences with KEGG Orthology terms and identifies the frequently occurring (or significantly enriched) pathways among the queried sequences compared against a background distribution. 5 pathway databases are used (KEGG Pathway, PID, BioCyc, Reactome, Panther) and 5 human databases (OMIM, KEGG Disease, FunDO, GAD, NHGRI GWAS).