Abstract
1. Six purified amino acid diets containing 6 0 g cystine/kg and the following levels of L-methionine (g/kg diet): 21, 2–7, 3–3, 3–9, 4•5, 9•0 were presented to twelve weanling kittens (six male and six female) for six periods of 10 d each. Kittens were assigned to the diets in accordance with a 6 x 6 balanced Latin-square design. 2. Body-weight gains of males and females attained apparent plateaux at 3–3 g methionine/kg diet and were respectively (mean + SEM) 22 ±4 and 18 + 2 g/d. Daily food intakes attained apparent plateaux at 2.7 g methionine/kg diet for male and female kittens and were 63+10 and 49+ 4 g/d respectively. Nitrogen retentions (calculated as dietary-N intake minus faecal- and urinary-N excretion) attained apparent plateaux at 3.9 e methionine/ke diet for both male and female kittens and were 0–85 + 0*15 and 0*65 + 0*05 e/d resnectivelv. 3. Previous work has shown that the kitten's L-methionine requirement, in a diet lacking cystine, is 7–5 g/kg diet. Our results indicate that the kitten's L-methionine requirement is 3.9 g/kg diet when 6.0 g cystine/kg is provided, thus approximately 50% of the animal's sulphur amino acid requirement can be met by cystine.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 411-417 |
| Number of pages | 7 |
| Journal | British Journal of Nutrition |
| Volume | 49 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 1 1983 |
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ASJC Scopus subject areas
- Medicine (miscellaneous)
- Nutrition and Dietetics
Cite this
Methionine Requirement of Kittens Given Amino Acid Diets Containing Adequate Cystine. / Smalley, Katherine A.; Rogers, Quinton; Morris, James.
In: British Journal of Nutrition, Vol. 49, No. 3, 01.01.1983, p. 411-417.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Methionine Requirement of Kittens Given Amino Acid Diets Containing Adequate Cystine
AU - Smalley, Katherine A.
AU - Rogers, Quinton
AU - Morris, James
PY - 1983/1/1
Y1 - 1983/1/1
N2 - 1. Six purified amino acid diets containing 6 0 g cystine/kg and the following levels of L-methionine (g/kg diet): 21, 2–7, 3–3, 3–9, 4•5, 9•0 were presented to twelve weanling kittens (six male and six female) for six periods of 10 d each. Kittens were assigned to the diets in accordance with a 6 x 6 balanced Latin-square design. 2. Body-weight gains of males and females attained apparent plateaux at 3–3 g methionine/kg diet and were respectively (mean + SEM) 22 ±4 and 18 + 2 g/d. Daily food intakes attained apparent plateaux at 2.7 g methionine/kg diet for male and female kittens and were 63+10 and 49+ 4 g/d respectively. Nitrogen retentions (calculated as dietary-N intake minus faecal- and urinary-N excretion) attained apparent plateaux at 3.9 e methionine/ke diet for both male and female kittens and were 0–85 + 0*15 and 0*65 + 0*05 e/d resnectivelv. 3. Previous work has shown that the kitten's L-methionine requirement, in a diet lacking cystine, is 7–5 g/kg diet. Our results indicate that the kitten's L-methionine requirement is 3.9 g/kg diet when 6.0 g cystine/kg is provided, thus approximately 50% of the animal's sulphur amino acid requirement can be met by cystine.
AB - 1. Six purified amino acid diets containing 6 0 g cystine/kg and the following levels of L-methionine (g/kg diet): 21, 2–7, 3–3, 3–9, 4•5, 9•0 were presented to twelve weanling kittens (six male and six female) for six periods of 10 d each. Kittens were assigned to the diets in accordance with a 6 x 6 balanced Latin-square design. 2. Body-weight gains of males and females attained apparent plateaux at 3–3 g methionine/kg diet and were respectively (mean + SEM) 22 ±4 and 18 + 2 g/d. Daily food intakes attained apparent plateaux at 2.7 g methionine/kg diet for male and female kittens and were 63+10 and 49+ 4 g/d respectively. Nitrogen retentions (calculated as dietary-N intake minus faecal- and urinary-N excretion) attained apparent plateaux at 3.9 e methionine/ke diet for both male and female kittens and were 0–85 + 0*15 and 0*65 + 0*05 e/d resnectivelv. 3. Previous work has shown that the kitten's L-methionine requirement, in a diet lacking cystine, is 7–5 g/kg diet. Our results indicate that the kitten's L-methionine requirement is 3.9 g/kg diet when 6.0 g cystine/kg is provided, thus approximately 50% of the animal's sulphur amino acid requirement can be met by cystine.
UR - http://www.scopus.com/inward/record.url?scp=0020553836&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0020553836&partnerID=8YFLogxK
U2 - 10.1079/BJN19830050
DO - 10.1079/BJN19830050
M3 - Article
C2 - 6860623
AN - SCOPUS:0020553836
VL - 49
SP - 411
EP - 417
JO - British Journal of Nutrition
JF - British Journal of Nutrition
SN - 0007-1145
IS - 3
ER -