tokens: Deletion mapping of the human presenilin-1 ( PS1 ) promoter delineated the most active fragment from -118 to +178 in relation to the transcription start site mapped in this study , in both human neuroblastoma SK-N-SH and hepatoma HepG2 cells .
folded_tokens: deletion mapping of the human presenilin-1 ( ps1 ) promoter delineate the most active fragment from -118 to +178 in relation to the transcription start site map in this study , in both human neuroblastoma sk-n-sh and hepatoma hepg2 cell .