IRNA的碱基配对数都较其它RNA更富有灵活性，因此表现较强的柔顺性。
The number of base pairs of IRNA was more changeable than other RNAs. Therefore, IRNA showed strong flexibility.
型内含子的序列差异很大，但是它们都具有保守的碱基配对区，即保守的二级结构。
Although having great variance in sequence, group I introns share a number of conserved base-paired regions, which take part in the formation of the catalytic structure.
型内含子的序列差异很大，但是它们都具有保守的碱基配对区，即保守的二级结构。
Although having great variance in sequence, group I introns share a number of conserved base-paired regions, which take part in the formation of the catalytic structure.
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