<i>C. elegans</i> operons contain a higher proportion of genes that express multiple transcript isoforms.

<p>(A) <i>C. elegans</i> operonic genes express more transcript isoforms per gene than non-operonic genes do. (B) <i>C. elegans</i> operons contain a higher proportion of genes that express multiple transcript isoforms than non-operonic genes do. (C) Alternatively spliced <i>C. elegans</i> operonic genes and non-operonic genes have a similar number of transcript isoforms per gene. Z-test was performed (Figure 1A and 1C) to evaluate the significance of difference between the means of transcript numbers. Error bars represent standard deviations.