NUTR 251 Lecture Notes - Lecture 6: Hydrochloric Acid, Diarrhea, Amine

• School: PSU
• Department: Nutrition
• Course: NUTR 251
• Professor: Nadine Wolf

Document Summary

- the chemist"s view of protein: carbon, hydrogen, oxygen and nitrogen, the unit of protein: basic 20 amino acids, consisted of the amino group (- Nh2) and the carbolic acid group (-cooh: 9 essential amino acids: must be supplied by the diet, 11 non-essential amino acids: body can synthesize and produce as long as nitrogen is consumed. - basics of proteins: peptide bonds (-nhch) link different or same amino acids, amino acid sequencing, primary structure: chemical bonds, secondary structure: electrical attraction, tertiary structure: hydrophilic and hydrophobic, quaternary structure: two or more polypeptides. - denaturation of proteins: disruption of stability, uncoil and lose shape, denaturation in extreme acidic or basic environment, denaturation by oxygen, example: cooking an egg, curdling of milk or rotting process of meat. - protein absorption: transport into intestinal cells: uses of amino acids by intestinal cells, unused amino acids transported to liver, enzyme digestion, predigested protein: causing bloating and diarrhoea;