PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12686130-3 2003 Histidine and phenylalanine ammonia-lyases (HAL and PAL) possess a catalytically essential electrophilic group which has been believed to be dehydroalanine for 30 years. Histidine 0-9 histidine ammonia-lyase Homo sapiens 44-47