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METABOLISM OF

AMINO ACIDSassistant professor Dr. Abdulhussien M.Alebor! Colle"e of phar#a$! Bab!lon

%ni&ersit!

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'. Introdu$tion

(.A#ino a$id $lassi)$ation

*.So#e de)nitions+ , nitro"en balan$e -NB ,protein re/uire#ent , biolo"i$al &alue -B0

1.Di"estion of protein

2.Absorption of protein

3.Metaboli$ fate of protein

4.Metabolis# of a#ino a$ids+, re#o&al of a##onia+ b! dea#ination5 transa#ination

and transdea#ination, fate of $arbon s6eletons of a#ino a$id

, #etabolis# of a##onia

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Essential a#ino a$ids +L!sine5 Leu$ine5 Isoleu$ine5 0aline5 Methionine57hen!lalanine5 Threonine5 Tr!ptophan

Nonessential a#ino a$ids+Alanine5 "l!$ine5 aspartate 5 "luta#ate5 serine5 t!rosine5$!steine 5 proline 5 "luta#ine5 aspar"ine

8istidine 9 ar"inine are semi essential.

The! are essential onl! for infants "ro:th5 but not forold $hildren or adults :here in adults histidinere/uire#ent is obtained b! intestinal ;ora 9 ar"inine b!urea $!$le.

For for#ation of ne: tissue protein +all essential a#ino a$ids that $an not be s!nthesi

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