15N-enrichment of leucine in the deproteinized plasma, crude mucin and excreta sampled from precision-fed cecectomized roosters after a single-injection of 15N-leucine1.
In a previous study with LSL-LITE layers (-23 to 30-week-old), isoleucine at 0.72% and 0.84% produced values for FCR at 1.45 and 1.44, respectively and shared significance with 0.78% isoleucine (1.49)