41. In different words, rennet will cut-off the hairy layer of casein micelles. 42. These other proteins are more water-soluble than caseins and do not form larger structures. 43. It seems that the MuSK receptor recruits casein kinase 2, which is required for clustering. 44. All these methods use casein as the substrate to quantify proteolytic or milk-clotting activities. 45. The casein proteins enter a more ordered system, attributing to a strong gel structure formation. 46. Curds contain hard solids made mostly of casein and calcium that resist being broken up for digestion. 47. Since milk's pH is 6.6, casein has a negative charge in milk. 48. This includes most inks, watercolors, temperas, caseins , gouaches, and modern acrylic paints. 49. The casein micelle becomes destabilized as alpha and beta-casein are now exposed to the environment. 50. The casein micelle becomes destabilized as alpha and beta-casein are now exposed to the environment.