tokens: Splicing of the K-SAM alternative exon of the fibroblast growth factor receptor 2 gene is heavily dependent on the U rich sequence IAS1 lying immediately downstream from its 5 ' splice site .
folded_tokens: splicing of the k-sam alternative exon of the fibroblast growth factor receptor 2 gene be heavily dependent on the U rich sequence ias1 lie immediately downstream from its 5 ' splice site .