In mouse pluripotent embryonal carcinoma P19 cells with SRSF3-GFP expression, anti-GFP CLIP discovered hundreds of transcripts in association with SRSF3-GFP, including PTBP1, SLAIN2 and the intron-retained mRNA isoforms SRSF3 and SRSF7 15] 86, and identified many SRSF3-GFP binding motifs with a pentamer sequence UCAUC, CUUCA, CAUCA, CAUCU, or UCAAC 87. The gene discussed is SRSF3; the disease is embryonal carcinoma.