Table 3

Phenyalanine and Tyrosine Kinetics

LOW-FIT (n = 5)

FIT (n = 6)

BL

(D4)

EX1

(D7)

EX2

(D11)

BL

(D4)

EX1

(D7)

EX2

(D11)

P-values (Group × Time Effect)

Q_p

(umol·kgFFM^-1·h^-1)^a

51.6 ± 7.0

48.7 ± 3.1

50.0 ± 6.2

55.2 ± 7.1

55.4 ± 3.9

54.7 ± 8.0

0.73

Q_pt

(umol·kgFFM^-1·h^-1)^b

7.6 ± 1.9

6.2 ± 1.6

5.9 ± 1.7

6.0 ± 2.1

4.9 ± 2.6

4.8 ± 1.4

0.97

Q_p - Q_pt

(umol·kgFFM^-1·h^-1)^c

44.1 ± 6.3

42.4 ± 2.6

44.1 ± 5.7

49.3 ± 6.1

50.5 ± 4.3

49.9 ± 7.6

0.62

(Q_p - Q_pt) - Q_p

(umol·kgFFM^-1·h^-1)^d

-7.5 ± 1.9

-6.3 ± 1.6

-5.9 ± 1.7

-6.0 ± 2.1

-4.9 ± 2.6

-4.8 ± 1.4

0.29

^a whole-body protein breakdown

^b net protein oxidation (conversion rate from phenylalanine to tyrosine)

^c whole-body protein synthesis

^d net protein balance

Smith et al. Nutrition & Metabolism 2009 6:28   doi:10.1186/1743-7075-6-28