图3. 患者治疗前后骨髓标本中CD19 mRNA不同外显子区（A）及CD19不同转录本（B）的表达情况.
V1~V5代表5种不同的转录本，对应ensembl数据库中不同转录本的ID分别为：ENST00000567368、ENST00000566890、ENST00000565089、ENST00000324662、ENST00000538922，V1~V3为3种内含子滞留型转录本，V4、V5为两种编码外显子的转录本；Pre：BiTE治疗前；R：BiTE治疗无效后
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