PAAF1 and colorectal carcinoma: Examples include Production of Putrescine (gene: Putrescine, speC), Gamma-aminobutyric acid (GABA) shunt (genes: puuE, gabD, metabolite: GABA), Propanoyl-CoA metabolism (genes: paaF, fadA), Lysine degradation (genes: ldcC, prr, csiD, paaF, metabolite: 5-Aminopentanoic acid), Tyrosine biosynthesis (genes: tyrB, tyrA), all of which were upregulated in the CRC groups.