While identification of open reading frames within a DNA sequence is straightforward, identifying coding sequences is not, because the cell translates only a subset of all open reading frames to proteins.
虽然识别DNA序列内的开放阅读框简单明了，但识别编码序列却并非如此，因为细胞只会把所有开放阅读框的一部分翻译为蛋白质。