Features of chromosomal locations of pre-miRNA in bovine MG. (A) Pre-miRNA densities on bovine chromosomes, calculated by the number of pre-miRNAs per Mb of DNA. (B) The locations of bovine pre-miRNAs on each chromosome. Dots represent 55 clusters; black lines represent pre-miRNA locations. (C) The pre-miRNA structure. The mir-26b-5p mature sequence is boxed in red, while the CN-468-3p sequence is boxed in purple.