PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8390283-8 1993 The 12th mutation GTG-->GGG (valine-->glycine) at codon 216 was expressed in line SCC-12 clone B along with an apparently normal p53 allele and is to our knowledge a novel mutation. Glycine 44-51 tumor protein p53 Homo sapiens 135-138