growth ( delta weight , delta length , delta head circumference , and delta skinfold thickness ) , nitrogen retention , and chemical indices of metabolic tolerance ( bun concentration and acid-base status ; plasma amino acid concentrations including free and bound cyst ( e ) ine ; urinary excretion of sulfur amino acids ) were determined serially in low birth weight infants ( 900 to 1,750 g ) fed formulas differing only in protein quality .
C0002520
amino acid
C0002527
sulfur amino acids