It could be speculated that these highly conserved base positions proximal to the stop codons, such as -2, -1, +4, +5, and +6 would act as part of the extended stop signal in translation termination.

• AUG侧翼区高度保守的-1、-2、-3、-5、-6、+4、+5和+6等8个位点可能参与翻译的起始。