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proteinsLarge molecules consisting of up to thousands of AMINO ACIDS linked together by peptide bonds to form polypeptides which, in turn, are linked to form proteins. These long chains of amino acids are often folded in specific ways. Fibrous proteins, such as COLLAGEN, are formed from spiral strand polypeptides. They are insoluble and constitute much of the structure of the body. Globular proteins are soluble and include the ENZYMES, many of the hormones and the blood proteins such as haemoglobin and the IMMUNOGLOBULINS (antibodies). Conjugated proteins contain other constituents such as sugars (glycoproteins) and lipids (lipoproteins). See also ABC TRANSPORTER PROTEINS, ACTIN BINDING PROTEINS, ACUTE PHASE PROTEINS, ALPHAFETOPROTEIN, AMYLOID, AMYLOID PRECURSOR PROTEIN, ANNEXINS, ANTIBODY, CHAPERONES, CHEMOKINES, COMPLEMENT, CONFORMATIONAL EPITOPE, CORE OCTAMER, CYTOKINES, DENATURATION, ELASTINS, FIBROBLAST, GLUTEN, GLYCOPROTEINS, G PROTEINS, GRANINS, HEAT-SHOCK PROTEINS, INTERMEDIATE FILAMENT PROTEINS, KERATIN, LECTINS, LIGAMENTS, LIPOPROTEINS, MEMBRANE-PROTEIN ION CHANNELS, MOTOR PROTEINS, MUSCLE, PLASMA PROTEINS, POLYMER, PRION PROTEINS, PROTEASE, PROTEIN BINDING, PROTEIN FOLDING, PROTEIN SYNTHESIS, REPRESSOR PROTEIN, RNA, SINGLE STRAND BINDING PROTEINS, TAU PROTEINS, TERTIARY STRUCTURE AND UBIQUITIN.
proteinslarge polymers consisting of one or more sequences of amino acid subunits joined by peptide bonds: the major functional and structural components of body cells. The body of a 70 kg man contains about 11 kg protein. The protein mass can be influenced by nutritional status, physical activity and pathological factors. Proteins in the diet typically account for 10-15% of energy intake and the currently recommended protein requirement for sedentary individuals is 0.8 g per kilogram body mass per day. The optimal protein intake for strength athletes may be as high as 1.7-1.8 g and for endurance athletes 1.2-1.4 g per kilogram body mass per day. See also nitrogen balance.
Patient discussion about proteins
Q. I get about 190 grams of protein a day. Is that too much protein? Have you ever seen a guy living only for food? No? Here I am. I get about 190 grams of protein a day. Is that too much protein? My weight is 183 pounds.
Q. Does the cooking have a negative effect on the protein content of the food? I have heard that high temperatures cooking breaks the protein, so does the cooking have a negative effect on the protein content of the food?
Q. Is it true that Casein protein can cause Cancer, or is harmful to the human body? Someone left a comment on my blog about Casein protein being bad for the body and that it could lead to Cancer. Is this true?