Fatty acid synthase ( FASN ) is a key anabolic enzyme for de novo fatty acid synthesis , which is important in the development of colon carcinoma .
B-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct O B-GeneOrGeneProduct O O O O O O O O O B-ChemicalEntity I-ChemicalEntity O O O O O O O O O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O