tokens: One form of the SBEI gene transcript in 12-day old kernels contained the exon I+II+III combination at the 5 ' end , whereas other forms differed by inclusion of intron 1 or exclusion of exon II sequences .
folded_tokens: one form of the sbeus gene transcript in 12-day old kernel contain the exon i+ii+iius combination at the 5 ' end , whereas other form differ by inclusion of intron 1 or exclusion of exon ii sequence .