staphylococcus aureus s-6 was able to utilize glutamate , proline , histidine , aspartate , alanine , threonine , serine , or glycine as a major energy source , when these were added singly at a concentration of 2.5 g/liter to a base medium containing salts , vitamins , and 30 mg of each of 18 amino acids per liter .
C0017890
glycine
C0002520
amino acids