lation of ovine mammary mRNAs in a wheat germ cell-free system have been investigated. The amino terminal extensions of a" -, a,2-' and /:i-ca­seins (15 amino acid residues) showed a strong homology suggestive of common ancestor derivation.

ROLE OF CASEIN KINASE IN THE BIOSYNTHESIS AND PHOSPHORYLATION OF MILK PROTEINS.

E. W. Bingham et al. Eastern Regional Research Center, Philadelphia, U.S.A.

The specificity of casein kinase in relation to the primary structure was discussed.

THE CARBOHYDRATE PORTION OF MILK GLYCOPROTEINS.

P. Jolles Universite de Paris V, France

The site of carbohydrate binding in the K-casein molecule was deter­mined.

POST SECRETORY AGGREGATION OF CASEIN. B. E. Brooker

National Institute for Research in Dairying, Reading and

C. Holt Hanna Research Institute, Ayr, Great Britain

The results of electronmicrographic observation were submitted to explain possible processes by which giant micelles may be formed.

A STUDY OF THE GENETIC POLYMORPHISM OF BOVINE a,,-CASEINS.

F. Grosclaude Institut National de la Recherche Agronomique, France

Existence of a,,-casein, A. B, C and D was demonstrated.

SESSION B. ASSOCIATION OF PROTEINS

THE ASSOCIATION OF PROTEINS. V. A. Bloomfield

University of Minnesota, SI. Paul. U.S.A.

Main chemical forces involved and their thermodynamic implication were discussed in this main lecture.

A PHOSPHATE-INDUCED, SUBMICELLE-MICELLE EQUILIBRIUM IN RECONSTITUTED CASEIN

MICELLE SYSTEMS. C. W. Slattery

Loma Linda University, California. U.s.A.

Schlieren patterns of reconstituted casein micelles were used.

QUANTlTATION OF CASEIN AGGREGATION BY USE OF POLYFUNCTIONAL MODELS.

T. G. Parker and D. G. Dalgleish Hanna Research Institute, Ayr. Great Britain

The theory of polyfunctional aggregation was applied to Caa,,-ca­seinate behaviour and it was found that over three reactive sites on casein quantify the aggregation behaviour.

THE KINETICS OF THE PRECIPITATION OF CHEMICALLY MODIFIED a,,-CASEIN BY

CALCIUM. D. S. Horne

Hanna Research Institute, Ayr. Great Britain

A new and interesting hypothesis was presented based on a quan­titative relationship between the aggregation rate of the casein and the monomer net charge. The precipitation of «,,-casein by calcium was judged to be a similar phenomenon to isolectric precipitation of the ca­sein.

A18

THE ASSOCIATION OF SH-K-CASEIN AT pH 7.0. H. J. Vreeman

Nederlands Instituut voor Zuivelonderzoek, Ede, The Netherlands

The monomer-polymer equilibrium was explained.

ON THE SIZE OF MONOMERS AND POLYMERS OF /:i-CASEIN. W. Buchheim

Institute for Physics, Federal Dairy Research Center Kie\. West Germany

and D. G. Schmidt

Netherlands Institute for Dairy Research, Ede. The Netherlands

The size of /:i-casein polymer was estimated to be 40-50 monomers using electronmicroscopy.

STRUCTURE OF /:i-CASEIN. S. Arima and R. Niki

University of Hokkaido, Sapporo, Japan

Results using sedimentation equilibrium were similar to those re­ported in the preceding paper.

APPLICATION OF MULTIPLE REGRESSION ANALYSIS TO SEDIMENTATION EQUILIBRIUM

DATA OF «,,- and K-CASEINS INTERACTIONS FOR THE CALCULATION

OF MOLECULAR WEIGHT DISTRIBUTION. S. Nakai and F. van de Voort

University of British Columbia. Vancouver, Canada

Using a newly developed quantitative method. easy dissociation of K­casein prior to forming a complex with «,,-casein was demonstrated.

SESSION C. MILK PROTEINS: COMPARATIVE ASPECTS, AND THE STUDY OF SOME

OF THE MINOR CASEINS.

COMPARATIVE ASPECTS OF MILK PROTEINS. R. Jenness

University of Minnesota. St. Paul, U.S.A.

An interesting uniformity of bound Ca and P to casein in milks of different species was reported in this main lecture.

BUFFALO a,c-CASEIN: ISOLATION AND CHARACTERIZATION.

P. Petrilli, L. Chianise and F. Addeo Instituto di Industrie Agrarie, Napoli, Italy

Similarity of «",-casein of buffalo milk with its counterpart in bovine milk was reported.

HUMAN f3-CASEIN. R. Greenberg and M. L. Groves

Eastern Regional Research Center. Philadelphia. U.SA.

Multiphosphorylation of human /:i-casein using sequence analysis was discussed.

THE INTERACTION OF CASEIN WITH HYDROXYAPATITE. R. W. Sleigh, T. B. Sculley and A. G. MacKinlay

University of New South Wales. Kensington, Australia

The mechanism of binding of casein with hydroxyapatite in chroma­tographic separation was studied. It was not the phosphate content alone which determined the strength of binding but also the relative position of the phosphate residues.

J. Inst. Can. Sci. Technol. Aliment. Vol. 12. No. I. Janvicr 1979