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Our objectives were to evaluate potential signaling pathways regulating rumen protozoal chemotaxis using eukaryotic inhibitors potentially coordinated with phagocytosis as assessed by fluorescent bead uptake kinetics. Wortmannin (inhibitor of phosphoinositide 3-kinase), insulin, genistein (purported inhibitor of a receptor tyrosine kinase), U73122(More)
In dairy rations, Met is often a limiting amino acid that is provided by rumen-undegradable protein and rumen-protected sources of Met. A Met precursor, 2-hydroxy-4-(methylthio) butanoic acid (HMB) has undergone considerable study for ruminal and postruminal metabolism, whereas its isopropyl ester (HMBi) has been evaluated primarily with respect to its(More)
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