bta-mir-15b: Bta-mir-15b is a differentially expressed microRNA (miRNA) that has been studied in various contexts. In a study on lactation in cows, bta-mir-15b was found to be differentially expressed in peak and late lactation, with higher expression levels in late lactation tissue compared to peak lactation [PMC3498112]. In another study on fertility in bulls, bta-mir-15b was found to be higher in the high motility fractions compared to the low motility fractions [PMC9113469]. Bta-mir-15b has also been studied in relation to various diseases. It was found to be upregulated in cows with metritis compared to healthy cows [PMC7832875]. Additionally, bta-mir-15b has been implicated in mastitis disease development and is predicted to target the gene IKBKB, which is involved in the NF-κB signaling pathway [PMC6162677]. Furthermore, bta-mir-15b has been shown to play a role in gut development, immune function, and digestive functions [PMC6162677]. Overall, bta-mir-15b is a miRNA that exhibits differential expression and plays a role in various biological processes and diseases.