NUTRI - PROTEIN Flashcards
Are taken from the Greek word protos meaning
primary, ranking first, or occupying the first position.
The first substance is recognized as a vital part of a
living tissue. They are organic substances that upon
digestion, yields amino acids.
PROTEINS
Are taken from the Greek word protos meaning
primary, ranking first, or occupying the first position.
3 CLAS OF PROTEINS
SIMPLE
COMPOUND
DERIVED
Are those which yield only amino acids upon
hydrolysis.
SIMPLE P
soluble in water and coagulated by
heat
ALBUMINS
insoluble in water, soluble in a dilute
salt solution, and coagulated by heat. Important
source of protein in seed plants and is found in
minute amounts in cereals. Globulins found in
animal fluids are enzymes, antibodies, and
fibrous and contractile proteins usually
contained in the blood plasma.
GLOBULINS
- insoluble in neutral solvents but
soluble in weak acids and alkalis; they are
coagulated by heat. It is found in wheat and is
responsible for some of the refined baking
properties in bread wheat
GLUTELINS
soluble in 70% to 80% alcohol but
insoluble in absolute alcohol, water, and salt
solutions.
PROLAMINS
insoluble in all neutral solvents
and in dilute acids and alkalis
ALBUMINOIDS
- basic polypeptides
are soluble in water but not coagulated by heat;
they are found in the nuclei of cells.
HISTONES AND PROTAMINES
Conjugated proteins, or proteins are
combinations of simple proteins and some other
non-protein substance called a prosthetic group
attached to a molecule.
COMPOUND P
- are a
combination of a protein and large quantities of
complex polysaccharides such as Mucin found
in the secretion from gastric mucous
membranes.
MUCOPROTEINS AND GLYCOPROTEINS
- combinations of simple
proteins and nucleic acid. Deoxyribonucleic
nucleoproteins are necessary for the synthesis
of proteins in the cytoplasm.
NUCLEOPROTEINS
- are compounds of a protein and
a triglyceride or other lipids such as
phospholipids or cholesterol found in cell and
organelle membranes.
LIPOPROTEINS
are compounds of
phosphoric acid joined in ester linkage to a
protein found in casein of milk.
PHOSPHOPROTEINS
