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Proteolysis of β-casein in Cheddar Cheese

Published online by Cambridge University Press:  01 June 2009

J. A. Phelan ,
J. Guiney  and
P. F. Fox
J. A. Phelan
Affiliation:
National Dairy Research Centre, the Agricultural Institute, Fermoy, Co. Cork, Irish Republic
J. Guiney
Affiliation:
Department of Dairy and Food Chemistry, University College, Cork, Irish Republic
P. F. Fox
Affiliation:
Department of Dairy and Food Chemistry, University College, Cork, Irish Republic
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Summary

β-Casein is highly resistant to proteolysis in Cheddar cheese. A decrease in NaCl concentration reduced its resistance, but even in the absence of salt the amount of proteolysis of β-casein was slight. Proteolysis in Cheddar cheese increased when the moisture levels were raised by adding water. The relative susceptibility of β-casein to proteolysis by rennin was reduced considerably when the concentration of a sodium caseinate solution was raised from 10 to 20%. Sequestering the Ca2+ by means of EDTA had no significant effect on proteolysis of β-casein. It would appear that the resistance of β-casein to proteolysis is due to the substrate rather than the enzyme and it is suggested that the reduced relative susceptibility to proteolysis is due to some concentration-dependent physical change in the casein molecule which renders the β-casein inaccessible. The salt concentration would also appear to influence this change.

Cheddar-cheese flavour is largely independent of rennet concentration and it is possible to manufacture cheese of satisfactory quality using half-normal rennet levels.

Type
Research Article
Information
Journal of Dairy Research , Volume 40 , Issue 1 , February 1973 , pp. 105 - 112
Copyright
Copyright © Proprietors of Journal of Dairy Research 1973

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References

REFERENCES

Acker, L. W. (1969). Food Technology 23, 1257Google Scholar
Association of Official Agricultural Chemists (1965). Official Methods of Analysis, 10th edn.Washington, D.C.: A.O.A.C.Google Scholar
British Standards Institution (1955). B.S. 696. Gerber method for the determination of fat in milk and milk products, part II.Google Scholar
British Standards Institution (1963). B.S. 770. Methods for the chemical analysis of cheese.Google Scholar
Creamer, L. K. (1971). New Zealand Journal of Dairy Technology 6, 91.Google Scholar
Creamer, L. K., Mills, O. E. & Richards, E. L. (1971). Journal of Dairy Research 38, 269.CrossRefGoogle Scholar
Edwards, J. L. Jr & Kosikowski, F. V. (1969). Journal of Dairy Science 52, 1675.CrossRefGoogle Scholar
Fox, P. F. (1963). Journal of Dairy Science 46, 744.CrossRefGoogle Scholar
Fox, P. F. (1969). Journal of Dairy Science 52, 1214.CrossRefGoogle Scholar
Fox, P. F. (1970). Journal of Dairy Research 37, 173.CrossRefGoogle Scholar
Fox, P. F. & Walley, B. F. (1971). Journal of Dairy Research 38, 165.CrossRefGoogle Scholar
Guiney, J. (1972). M.Sc. Thesis, University College, Cork.Google Scholar
Kosikowski, F. V. (1966). Cheese and Fermented Milk Products. Ithaca, N.Y.: Author.Google Scholar
Kosikowski, F. V. & Mocquot, G. (1958). Advances in Cheese Technology, F.A.O. Agricultural Studies, no. 38.Google Scholar
Lawrence, R. C. & Gilles, J. (1969). New Zealand Journal of Dairy Technology 4, 189.Google Scholar
Ledford, R. A., Chen, J. H. & Nath, K. R. (1968). Journal of Dairy Science 51, 792.CrossRefGoogle Scholar
Ledford, R. A., O'Sullivan, A. C. & Nath, K. R. (1966). Journal of Dairy Science 49, 1098.CrossRefGoogle Scholar
Lindqvist, B. & Storoårds, T. (1959). 15th International Dairy Congress, London 2, 679.Google Scholar
Payens, T. A. J. & van Markwijk, B. W. (1963). Biochimica et Biophysica Acta 71, 517.CrossRefGoogle Scholar
Stadhouders, J. (1962). 16th International Dairy Congress, Copenhagen B, 353.Google Scholar
Thompson, M. P., Kiddy, C. A., Johnston, J. O. & Weinberg, R. M. (1964). Journal of Dairy Science 47, 378.CrossRefGoogle Scholar