Starter culture

Total free amino groups

(mM leucine equivalent/mL)

Day 1

Day 7

Day 14

Commercial starter culture

1.01 ± 0.03^eB

1.17 ± 0.06^eA

0.69 ± 0.02^dC

Lb. helveticus B-734

6.13 ± 0.11^aA

4.51 ± 0.10^aB

3.14 ± 0.17^aC

Lb. casei subsp. casei B-1922

1.26 ± 0.07^dC

3.66 ± 0.15^cA

2.26 ± 0.17^cB

Lb. paracasei subsp. paracasei B-4560

2.91 ± 0.02^bB

3.93 ± 0.08^bA

2.50 ± 0.06^bC

Lb. rhamnosus B-1445

2.93 ± 0.17^bA

2.32 ± 0.07^dB

2.12 ± 0.07^cB

Lb. rhamnosus B-442

2.45 ± 0.04^cA

2.22 ± 0.22^dA

0.89 ± 0.06^Db