seven ( lys , val , leu , thr , his , ile , phe , and met ) of the essential amino acids and six [ ala , glu ( nh2 ) , arg , pro , 1/2 cys , and asp ( nh2 ) ] of the nonessential amino acids were shown to be significantly higher in uv than in ua .
C0040005
thr
C0002525
essential