however , although plasma tyrosine and cyst ( e ) ine concentrations were within the 95 % confidence limits of the plasma concentrations goals , the lbw infant 's ability to use n-acetyl-l-tyrosine and cysteine hcl appears to be even less than that of the term infant and older child .
C0041485
tyrosine
C0067794
n-acetyl-l-tyrosine