Distribution of lost introns in Cryptococcus. (a) Histogram of the location of an unambiguous intron loss event relative to the entire coding length of the gene. Loss events are binned according to the position (in base-pairs) of their occurrence in a coding sequence divided by the coding sequence length. (b) Histogram of absolute distance between a lost intron and the 3' end of its transcript. Since this is an evaluation of transcript based intron loss, adjacent intron losses are considered single events and the distance for such cases involves only the 5' most intron.