codon_start=1 是指从序列位置1开始编码蛋白.
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We report the identification of a novel mutation, c.3G>A (p.Met1), affecting the translation initiation site. Expression analysis showed that the c.3G>A mutation switches the translation start site of NRXN1 to an in-frame downstream methionine and decreases synaptic levels of the mutant ...