TDF

是transcript-derived fragment 的英文縮寫，中文意思為 轉錄衍生片段，一般是進行擴增、轉錄後的產物片段，可用來基因序列對比等生物化學研究操作。

例句： In this study, we identified 212 transcript-derived fragments (TDFs) that were differentially expressed in resistant and susceptible strains.