Diorgenin = antifertility pills – Dioscorea.
Infants need histidine
Imino group A.A = proline, hydroxyproline
Neutral AA = alanine, glycine, valine
Neutral AA = alanine, glycine simplest AA, nor-carbon. (contain heme)
Tryptophan forms nictotinamide & indole acetic acid
Primary structure – most stable, strong covalent bond, specificity
Secondary structure – H2 bonds – – helical (keration) – pleated (silk)
Tertiary structure – poly peptide bends & folds as globular – Functional conformation ionic, covalent & H2 bond, S-S covalent bond stable
Quaternary structure – H2, ionic & hydrophobic bonds
Protein size - less soluble & more heat coagulable
1st class protein – animal
2nd class protein – vegetable (lack essential AA)
World’s most commonest protein = RUBISCO
Hordein = Barlley
Gliadin/glutenin = wheat
Zeatin = maize
Orgzanin = Rice
Product of Biological origin = odd no. of C.
Product of abiological origin = equal odd & even C atoms.
Digestibility Coefficient = percentage indigested protein absorbed in blood aster.
Biological value = percentage of N2 retained from out of N2 absorbed
Protein efficiency ratio – gain in wt/protein Consumed.
Net protein utilization =