PMC:3396637 / 10109-11406 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/3396637","sourcedb":"PMC","sourceid":"3396637","source_url":"https://www.ncbi.nlm.nih.gov/pmc/3396637","text":"To look into distinctive effects of TEs and SSs on intron size and position parameters, we divided introns into four basic classes: TS (both RSs), T (TEs), S (SSs), and N (neither TE nor SS). We focused on three essential intron features: fraction, length, and relative position in a gene. We made the following observations (Fig. 3). First, when plotting the percentage of introns in the four classes, we found that the pattern is rather heterogeneous, ie, the primates, the large mammals, and platypus are grouped together in a pattern of T \u003e N \u003e TS \u003e S, showing a transposon-dominant pattern, so is opossum that has a pattern of T \u003e TS \u003e N \u003e S. Second, mouse and rat form their own group, as it is noticed that both have more satellite sequences than other mammals: TS \u003e N \u003e T \u003e S. Third, aside from the dominant TS-free group or N, guinea pig (N \u003e T \u003e TS \u003e S), frog (N \u003e T \u003e TS \u003e S), and chicken (N \u003e T \u003e TS \u003e S) all have more transposons in their introns than satellites. Fourth, anole and zebrafish have a pattern of N \u003e TS \u003e T \u003e S, in a similar path as compared to mouse and rat regardless of N. If we pick a single most abundant RS-containing intron group, TS, T, S, and N, for a species, the fractions are 39.6%, 52.7%, 12.8%, and 72% in mouse, platypus, anole, and chicken, respectively.","tracks":[]}