指纹序列 FxGxxxHxxxW 是本课源文档中的必保知识点，前面页面未覆盖，需要单独补齐。
原文线索：, respectively, also contains an open reading frame with the typical BVMO fingerprint motif. However, upon cloning a
I型BVMO的标志性结构特征
补齐高优先级知识点：指纹序列 FxGxxxHxxxW。 原文线索：, respectively, also contains an open reading frame with the typical BVMO fingerprint mo