The number of miRNAs in rat genome in miRBase is much less than that of mouse and human.One effective method to identify new miRNAs is to utilize the homolog-based bioinformatrical method.In this report,this method was applied to predict new miRNAs of rats.The known miRNAs sequences were downloaded from miRBase,and used as query sequences to search the rat genome at UCSC Genome Bioinformatics by BLAT analysis.New miRNAs were selected based on commonly-used miRNA standards.As a result,45 new miRNAs were obta...