Amino Acid Analysis of Shell Membranes of Eggs From Young and Old Hens Varying in Shell Quality

Britton, W. M.; Hale, K. K.

doi:10.3382/ps.0560865

Cited by 26 publications

(10 citation statements)

References 5 publications

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“…Results of this study confirm the observations by others of high amounts of the sulfurcontaining amino acid, cystine (Baker and Balch, 1962;Britton and Hale, 1977;Abatangelo et al, 1978;Leach et al, 1981). Leach (1982) suggest that 70 to 75% of the membrane protein is characterized by having disulfide (cystine) crosslinks as well as the lysine derived crosslinks, desmosine and isodesmosine, but is distinct from elastin.…”

Section: Resultssupporting

confidence: 91%

“…The result of this experiment and of other similar experiments are shown in Table 2. The values are expressed as amino acid residues/100 residues and is thus an indication of the relative amounts of each ' Britton and Hale (1977). Values represent the mean of the combined analysis of both inner and outer shell membranes from eggs exhibiting low, medium, and high deformation.…”

Section: Resultsmentioning

confidence: 99%

“…Four amino acid ratios were required to classify correctly all shell membranes relative to deformation group, and only three ratios were necessary to identify correctly shell membranes from eggs of young and old hens grouped by low, medium, and high shell deformation. The work of Britton and Hale (1977) suggests that the amino acid composition of the shell membrane may be an integral factor in determining shell quality.…”

Section: Introductionmentioning

confidence: 99%

“…Other studies designed to determine the amino acid composition of the shell membrane include those of Candlish and Scougall (1969); Balch and Cooke (1970); Candlish (1972); Britton and Hale (1977); Abatangelo et al (1978); and Leach et al (1981).…”

Section: Introductionmentioning

confidence: 99%

“…The relevance of the amino acid composition of the shell membrane to eggshell quality has recently been investigated by Britton and Hale (1977). These authors examined the amino acid composition of eggshell membranes from eggs of young and old hens exhibiting low, medium, and high shell deformation values.…”

Section: Introductionmentioning

confidence: 99%

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The Relationship of the Amino Acid Composition of a Portion of the Outer Eggshell Membrane to Eggshell Quality

1985

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A one-week sample of eggs was collected from 10 individually housed brown-egg laying hens at 43 weeks of age and again at 75 weeks of age. One egg from each hen at each age with a specific gravity nearest the mean for that hen was chosen for further analyses. Eggs laid by the younger hens had a significantly higher specific gravity than those laid by the older hens. Amino acid analysis was performed on the outer portion of the outer shell membrane. The weight percentage of amino acids in the dried membrane was significantly less for the 75-week-old hens. There was no significant correlation between egg weight and weight percentage of amino acids. Analysis of covariance using a stepwise regression procedure indicated that the changes in specific gravity are due to a combination of age and amino acids and not to age alone. Age alone did not account for a significant part of the variability in the observed specific gravity. Three amino acids -aspartic acid, proline, and phenylalanine -in conjunction with age accounted for over 80% of the variability observed in specific gravity. These studies further implicate the shell membrane as a determinant of shell quality. (Key words: amino acid analysis, eggshell membranes, eggshell quality) 1985 Poultry Science 64:176-182

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