Maleki (or somebody else of the same name) wrote in message
<[email hidden]> thusly:
Quoted message said:When we manufacture the protein in our bodies by eating
carbohydrate sources of food (rice, beans, etc), is it the
carbohydrates themselves in such sources that we utilize
to build the proteins or do we use the trace protein
material in them?
Carbohydrates as their name suggests are composed of carbon,
hydrogen and oxygen.[1] All proteins contain nitrogen, some
contain sulphur and other elements also, so they cannot be
made from carbohydrates alone. In fact they are built up
from amino acids supplied from the proteins in the food or
synthesized within the body from other substances.
Amino acids have the general formula NH2-CHX-COOH where X
is a single atom or group of atoms which identifies the
particular amino acid. Proteins are formed by joining these
together into chains - the OH is removed from the end of
one amino acid, and one H from the NH2 of the next one
(these combine to make H2O), and the loose ends are then
joined together:
-NH-CHX-COO-NH-CHX-COO-NH-CHX-COO-
and it is the length of the chain and the sequence of the
different X's that characterise each particular protein.
[1] Many organic compounds are formed of carbon, hydrogen
and oxygen only. The usual definition of "carbohydrates"
in particular is that there must be twice as many
hydrogen atoms as oxygen atoms - the same proportion as
in water. Glucose (C6 H12 O6) and sucrose (C12 H22 O11)
confirm to this rule, but so do formaldehyde (HCHO),
acetic acid (CH3COOH) and lactic acid (CH3CH(OH)COOH),
and these three are not generally reckoned as
carbohydrates.
--
Paul Townsend I put it down there, and when I went back to
it, there it was GONE!
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