PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 32893576-6 2020 This study successfully knocked out the CITT2 and MLS1 genes and weakened the PGI1 gene by using CRISPR/CAS9, which directly influenced the production of beta-amyrin and provided some reference for the the metabolic engineering of triterpernoid producing strain. triterpernoid 231-244 malate synthase MLS1 Saccharomyces cerevisiae S288C 50-54