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. 2007 Feb 19;8(2):R21. doi: 10.1186/gb-2007-8-2-r21

Table 2.

Short versus long and first versus non-first introns

Short introns Long introns
N Ki P GC P N Ki P GC P
First 1,880 1.028 0.550 3,961 1.075 0.438
Others 23,969 0.970 < 0.001 0.463 < 0.001 21,863 1.059 0.016 0.339 < 0.001

Shown is a comparison of mean Ki and GC content for first and other introns, within short introns, and within long introns.