Predictions of microbial crude protein (MCP) synthesis for beef cattle generally rely on empirical regression equations. with intakes of energy and protein as key variables. Using a database from published literature. we developed new equations based on the intake of organic matter (OM) and intakes or concentrations of crude protein (CP) and neutral detergent fiber (NDF). https://www.roneverhart.com/2-1-2-x-1-4-x-36-Smooth-Saddle-Threshold-NGP-410-36/