cel-mir-67: Cel-mir-67 is a miRNA in Caenorhabditis elegans that is commonly used as a negative control in miRNA research due to its minimal sequence homology with mouse, rat, and human miRNAs [PMC7993499]. In a study, cells were transfected with various RNA molecules, including cel-mir-67 hairpin inhibitors [PMC4104030]. Another study used a biotinylated cel-mir-67 duplex control construct to investigate its binding to Tgfb2 and Smad2 mRNAs [PMC8361274]. The mature sequence of cel-mir-67 mimic is UCACAACCUCCUAGAAAGAGUAGA, while the mature sequence of the cel-mir-67 inhibitor is UCUACUCUUUCUAGGAGGUUGUGA [PMC5613373]. In miRNA target prediction, synthetic mimics of miR-135a-5p and the non-targeting negative control cel-mir-67 were obtained from GE Healthcare [PMC5540823]. Cel-mir-67 serves as an important control in miRNA research due to its distinct sequence from other known miRNAs in various species.
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