The effects of sheep alpha s1-casein CC, CD and DD genotypes on milk composition and cheese yield were studied. Processed bulk milk was collected from three groups of 15 ewes, carrying alpha s1-casein CC, CD and DD genotypes. CC milk was higher in casein content than CD or DD milk (+3.5 and +8.6% respectively), and had a higher protein: fat ratio and a smaller casein micelle diameter. In additi...

The levels of milk-specific mRNAs (alpha-casein, whey acidic protein) and proteins (casein, alpha-lactalbumin) were examined in the DIM series of mammary preneoplastic outgrowth lines and tumors. The constitutive production of casein protein was variable among the preneoplastic DIM outgrowth lines maintained in virgin mice. Outgrowth line DIM-2 consistently expressed a very low level of casein ...

Protein phosphorylation is believed to play a role in the regulation of ciliary motility in the protozoan Paramecium tetraurelia. Five protein kinases from Paramecium, activated by cyclic nucleotides or Ca2+, have been characterized previously. We report here the identification of a family of second-messenger-independent casein kinases in Paramecium. Casein kinase activity was enriched in the s...

The flavonoid rutin is recognized as playing an important role in the protection of plants against lepidopterans. Bioassays with this compound are generally carried out using artificial diets. Proteins of high energy value, such as casein, are important ingredients of insect artificial diets as a source of essential amino acids. However, such proteins can generally increase the allelochemical a...

The most part of Italian Brown Swiss milk goes to cheese so casein is fundamental. The trait currently used in selection is protein content tested in routine milk recording (test-day protein content). Now is possible to determine casein content on each cow by Fourier Transform Infrared Spectroscopy (IR). This allows to analyse casein routinely for each test day. In this study, 1022 milk samples...

The cell wall proteinase fraction of Streptococcus cremoris HP has been isolated. This preparation did not exhibit any activity due to either specific peptidases known to be located near the outside surface of and in the membrane or intracellular proteolytic enzymes. By using thin-layer chromatography for the detection of relatively small hydrolysis products which remain soluble at pH 4.6, it w...

I. In two experiments, sheep prepared with a rumen cannula and with re-entrant cannulas in the duodenum and ileum were continuously fed on diets of dried grass, dried grass plus formalin-treated casein, or dried grass plus untreated casein. Paper impregnated with chromic oxide was given once daily via the rumen fistula. 2. In ten 24 h collections of digesta entering the duodenum and eleven 24 h...

the purpose of the given work was to study the dairy efficiency of the delivered, local and crossbreed goats in three different generations (f1, f2 and f3), derived from their crosses, as well as the biochemical composition of milk and some bloodplasma hormones, participating in the process of lactopoez. for the biochemical tests of milk we have selected casein and serumproteins, iron in lactof...

Alpha-casein, more specifically known as αS-casein, is a predominant milk protein with important nutritional properties. αS-Casein, composed of two individual gene products, αS1and αS2-casein, has been described in the past few decades as having molecular chaperone properties. In performing as molecular chaperones, αScasein and its purified constituent proteins, αS1and αS2-casein, stabilise a w...

Twenty wether lambs (46 +/- 2 kg) fitted with ruminal and abomasal infusion catheters were used in a completely randomized design to determine the effects of differing proportions of ruminal and abomasal casein infusion on N balance in lambs fed low-quality brome hay (0.8% N, DM basis) for ad libitum intake. Wethers were infused with 0 (control) or 10.7 g/d of N from casein with ratios of rumin...