Posted 26 October 2009 - 04:19 AM
Alright, this is what I've got so far. I'll update if I find anything interesting.
d/l phenylalanine notes
D- a fraction of it breaks down into L.
D- analgesic properties due to blocking the enzyme that breaks
down enkephalin [endorphins]
D- a non-protein amino acid- does not participate in protein
biosynthesis. However, it may be found in some protein foods that
have been processed or aged.
L- precursor to Dopamine, norepinephrine and epinephrine
[adrenaline]
L- precursor to tyrosine
L- building block of proteins
L- Crosses BBB more efficiently than the D isomer.
L- uses the same active transport channel as tryptophan to cross
the BBB, in large quantities phenylalanine interferes with the
production of serotonin, which is a metabolic product of tryptophan
random.
Lignin is derived from phenylalanine and from tyrosine.
---------
FOODS
w/ phenylalinine:
Phenylalanine is contained in most protein-rich foods. Especially
good sources are dairy products (curd, milk, cottage cheese),
avocados, pulses and legumes (particularly peanuts and lima beans),
nuts (pistachios, almonds), seeds (piyal seeds), leafy vegetables,
whole grains, poultry, fish, other seafoods, and some diet
beverages.
breast milk, meat, chicken, fish, nuts, cheese, and other dairy
products. Starchy foods such as potatoes, bread, pasta, and corn
must be monitored. Many diet foods and diet soft drinks that
contain the sweetener aspartame must also be avoided, as aspartame
consists of two amino acids: phenylalanine and aspartic acid.
--
Diseases
phenylketonurina. occurs because l-pa is not converted into
tyrosine by Phenylalanine hydroxylase.
