PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16477621-2 2006 This study was undertaken to investigate the expression of CB1 and CB2 cannabinoid receptors in neurons that develop from retinoic acid (RA)-primed mouse P19 embryonal carcinoma cells. Tretinoin 122-135 interleukin 23, alpha subunit p19 Mus musculus 154-157 16477621-2 2006 This study was undertaken to investigate the expression of CB1 and CB2 cannabinoid receptors in neurons that develop from retinoic acid (RA)-primed mouse P19 embryonal carcinoma cells. Tretinoin 137-139 interleukin 23, alpha subunit p19 Mus musculus 154-157 16477621-3 2006 Both undifferentiated P19 cells and RA-treated P19 neurons were positive, by using reverse transcription-polymerase chain reaction (RT-PCR), for CB1 (but not CB2) mRNA. Tretinoin 36-38 interleukin 23, alpha subunit p19 Mus musculus 47-50