caa a22 4500 388063009 CHVBK 20180307125126.0 cr unu---uuuuu 161130e199811 xx s 000 0 eng 10.1017/S000711459800155X doi S000711459800155X pii (NATIONALLICENCE)cambridge-10.1017/S000711459800155X Comparison of egg-yolk protein hydrolysate and soyabean protein hydrolysate in terms of nitrogen utilization [Elektronische Daten] Egg-yolk protein hydrolysate (YPp) is an alternative protein source in formulas for infants with intolerance to cow's milk or soyabean protein, or for patients with intestinal disorders. However, the nutritional value of YPp has never been investigated. YPp was prepared by enzymic hydrolysis of delipidated yolk protein, which led to an average peptide length of 2.6 residues. Three experiments were performed. In Expt 1, we compared the intestinal absorption rate of YPp and soyabean protein hydrolysate (SPp) in rats. YPp and SPp solutions were injected into the duodenum of anaesthetized rats and blood samples were taken from the portal vein at 7, 15, 30, 60, and 120 min. A higher amino acid concentration in the serum of the YPp group demonstrated that YPp was absorbed faster than SPp. In Expt 2, the effects of dietary YPp and SPp on body-weight gain, protein efficiency ratio (PER) and feed efficiency ratio (FER) were determined. At the end of the experiment, body weight had increased in both groups, while PER and FER were significantly higher in rats fed on YPp. In Expt 3, to investigate the effects of dietary YPp and SPp on N metabolism, we determined the biological value and net protein utilization. Yolk protein was the reference protein. Biological value and net protein utilization values were very similar between animals fed on yolk protein and YPp diets, and significantly higher than in rats fed on the SPp diet. The present findings demonstrate that there is no adverse effect of hydrolysis of yolk protein on N utilization, and that the nutritive value of YPp is similar to that of yolk protein and superior to that of SPp. Copyright © The Nutrition Society 1998 Egg yolk nationallicence Soyabean protein nationallicence Nitrogen metabolism nationallicence Gutierrez Miguel A. Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan Mitsuya Takayuki Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan Hatta Hajime Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan Koketsu Mamoru Faculty of Engineering, Department of Applied Organic Chemistry, Gifu City, Yanagi Do 1-1, Gifu 501-11, Japan Kobayashi Rie Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan Juneja Lekh R. Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan Kim Mujo Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan British Journal of Nutrition Cambridge University Press 80/5(1998-11), 477-484 0007-1145 80:5<477 1998 80 BJN https://doi.org/10.1017/S000711459800155X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S000711459800155X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gutierrez Miguel A. Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan NATIONALLICENCE 700 1- Mitsuya Takayuki Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan NATIONALLICENCE 700 1- Hatta Hajime Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan NATIONALLICENCE 700 1- Koketsu Mamoru Faculty of Engineering, Department of Applied Organic Chemistry, Gifu City, Yanagi Do 1-1, Gifu 501-11, Japan NATIONALLICENCE 700 1- Kobayashi Rie Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan NATIONALLICENCE 700 1- Juneja Lekh R. Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan NATIONALLICENCE 700 1- Kim Mujo Central Research Laboratories, Taiyo Kagaku Co. Ltd, 1-3 Takaramachi, Mie 510-0844, Japan NATIONALLICENCE 773 0- British Journal of Nutrition Cambridge University Press 80/5(1998-11), 477-484 0007-1145 80:5<477 1998 80 BJN CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge