Alternative splicing in the expression of snoRNA gene cluster I and II in N. crassa. The open and black boxes represent snoRNAs and exons, respectively. The number below indicates the length (in nucleotides) of exons and introns. Thinner lines indicate introns and dashed lines indicate splicing activities. Arrows indicate the primers used in RT-PCR analysis.
Liu et al. BMC Genomics 2009 10:515 doi:10.1186/1471-2164-10-515