the other acidic and neutral amino acids were present in higher concentrations in the formula-fed infants than in the group fed human milk either during the early weeks of the study ( serine , glutamine , glycine , alanine , tyrosine , and methionine ) or consistently higher during the entire study ( threonine , glutamate , citrulline , valine , isoleucine , leucine , and phenylalanine ) .
C0301715
neutral amino acids
C0036720
serine