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Similarly, an increase was found in plasma uric acid, and plasma urea also increased but to a lesser extent. Liver proteolytic activity also was slightly increased by vitamin A deficiency.<\/jats:p><jats:p>3. Kidney D-amino acid oxidase (<jats:italic>EC<\/jats:italic>1.4.3.3) activity and plasma concentrations of total protein and free amino acids were not affected, at least in the first stages of the deficiency.<\/jats:p><jats:p>4. Oral dosing of deficient chicks with retinyl palmitate to provide 300 \u03bcg retinol, 24 h before killing, brought about a decrease in the activities of both enzymes and of plasma uric acid, and an increase in plasma urea.<\/jats:p><jats:p>5. Dietary levels of vitamin A were reflected not only in the liver concentrations of the vitamin but also in the plasma concentrations.<\/jats:p>","DOI":"10.1079\/bjn19740003","type":"journal-article","created":{"date-parts":[[2005,5,18]],"date-time":"2005-05-18T23:51:57Z","timestamp":1116460317000},"page":"1-11","source":"Crossref","is-referenced-by-count":4,"title":["Effect of vitamin A deficiency on protein catabolism in chicks"],"prefix":"10.1017","volume":"31","author":[{"given":"I.","family":"Bruckental","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I.","family":"Ascarelli","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"Bondi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2011,1,7]]},"reference":[{"key":"S0007114574000043_ref039","first-page":"318","volume-title":"Fluorescence Assays in Biology and Medicine,","author":"Udenfriend","year":"1962"},{"key":"S0007114574000043_ref033","doi-asserted-by":"publisher","DOI":"10.3109\/00365515309094197"},{"key":"S0007114574000043_ref001","doi-asserted-by":"publisher","DOI":"10.1021\/ac60092a039"},{"key":"S0007114574000043_ref022","doi-asserted-by":"publisher","DOI":"10.1042\/bj0670215"},{"key":"S0007114574000043_ref011","doi-asserted-by":"crossref","first-page":"4551","DOI":"10.1016\/S0021-9258(19)63825-1","volume":"245","author":"DeLuca","year":"1970","journal-title":"J. biol. 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