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Bar chart of enrichment ratios for Gene Ontology function categories. Gene expression levels of cells grown in the free cell period (FCP) were set as the background level. Corrected p-value ≤ 0.05 was used as a threshold. GO terms fulfilling this condition are defined as significantly enriched GO terms for the differentially expressed genes. AP, attachment period; SGP, sessile-growth period; BMP, biofilm-maturation period.
