Provided herein are compositions with enhanced protein specific activity, protein combinations and methods for the preparation thereof.

A method for preparation of low molecular weight porcine lympho-reticular polypeptides. The method comprises the enzymatic hydrolysis of a source of protein, wherein the source of protein comprises a blend of porcine liver and porcine spleen, with a first enzyme having proteolytic activity and a second enzyme having amylase activity.

A cell hydrolysate composition, the composition comprising substantially all protein polypeptides and/or polypeptide fragments derived substantially from all the proteins in a cell from an in vitro cell culture.

A cell hydrolysate composition, the composition comprising substantially all protein polypeptides and/or polypeptide fragments derived substantially from all the proteins in a cell from an in vitro cell culture.

Provided herein are compositions with enhanced protein specific activity, protein combinations and methods for the preparation thereof.

A selenium-chelating pea oligopeptide, a preparation method thereof and use thereof. After the selenium-chelating pea oligopeptide is subjected to digestion treatment in at least one of following three ways, a change rate of selenium content not more than 3% with respect to the selenium content before the digestion treatment: hydrolyzing for 4 hours by a pepsin at a pH value of 2 and a temperature of 37° C.; hydrolyzing for 6 hours by a trypsin at a pH value of 7.5 and a temperature of 37° C.; maintaining the temperature constant at 37° C., firstly hydrolyzing for 4 hours by the pepsin at a pH value of 2, and then continuing to hydrolyze for 6 hours by a trypsin at a pH value of 6.8. The preparation method thereof includes mixing and reacting an aqueous solution of pea oligopeptide and sodium selenite, and then being subjected to alcohol precipitation and drying.

A cell hydrolysate composition, the composition comprising substantially all protein polypeptides and/or polypeptide fragments derived substantially from all the proteins in a cell from an in vitro cell culture.

Novel nutritional compositions and methods for their manufacture, administration and use are disclosed. The nutritional compositions of the present invention are useful for the feeding of immature mammals, particularly those used for food, and/or performance animals, such as horses, and for companion animals, such as dogs and cats. The nutritional compositions and supplements of the present invention are effective in supporting the growth and health of the immature mammal, in supporting and stimulating its immune system, and in mitigating undesirable infections and other. Additionally, particular fractions of the unique peptides produced by the disclosed methods can be separated and utilized as therapeutic agents.

Provided herein are compositions with enhanced protein specific activity, protein combinations and methods for the preparation thereof.

Disclosed herein are methods for efficiently isolating collagen form a collagen source. The methods are inexpensive and do not require the use of proteolytic enzymes, decolorizing agents, antibacterial and antifungal agents, and the like. Further, the collagen produced by the methods described herein is substantially free of odor and discoloration. Still further, the collagen produced by the methods described herein is suitable to be used in cosmetics, food products, and pharmaceuticals or nutritional supplements.