A Comparison of d-, l-, dl-Methionine and Methionine Hydroxy Analogue Calcium in Chick Diets

摘要: Abstract NUMEROUS reports indicate equal utilization of the d - and l -isomers methionine by chickens (Grau Almquist, 1943; Fell et al., 1959; Leveille 1960; Bauriedel, 1963; Featherston 1962). On other hand, Bruggemann al. (1962) reported d- isomer to be inferior l- in purified diets. Marrett (1964) observed that was when diet contained an appreciable amount amino acids, but nutritionally equivalent -methionine absence isomers. Data indicating some acids depress more than others were recently (Marrett Sunde, 1965). Some short term excretion studies have also indicated poorer -isomer methionine. After intravenous infusion 1.5 grams dl into humans over a 5 minute period, Kinsell (1948) found urinary …