RT Journal Article T1 ACE-Inhibitory Activity of Whey Proteins Fractions Derived of Fermentation by Lacticaseibacillus rhamnosus GG and Streptococcus thermophilus SY-102 A1 Olvera Rosales, Laura Berenice A1 Perez Escalante, Emmanuel A1 Castañeda Ovando, Araceli A1 Contreras López, Elizabeth A1 Cruz Guerrero, Alma Elizabeth A1 Regal López, Patricia A1 Cardelle Cobas, Alejandra A1 González Olivares, Luis Guillermo K1 probiotic K1 whey fermentation K1 ACE inhibition K1 antihypertensive peptides K1 bioactive peptides AB Many studies have reported the benefits of probiotic microorganisms and the production of angiotensin-converting enzyme (ACE) inhibitors. Determining the proteolytic and ACE inhibition capacities during whey fermentation was the goal of the study. Lacticaseibacillus rhamnosus GG, Streptococcus thermophilus SY-102, and both bacteria together were initially inoculated into whey, reaching an initial concentration of 108 CFU per milliliter in each fermentation system. Through the use of TNBS, SDS-PAGE, and SEC-HPLC methods, the proteolytic profile was examined. An in vitro investigation was performed to test the ACE inhibition capacity. With S. thermophilus, the logarithmic phase of microbial development was shorter than with L. rhamnosus (6 and 12 h, respectively). The logarithmic phase in the co-culture fermentation, however, was extended to 24 h. There were no significant differences in pH between the fermentations. However, the co-culture had a greater concentration of protein hydrolysis (453 ± 0.06 μg/mL), as indicated by the amount of free amino groups. Similarly, this fermentation produced more low molecular weight peptides. The higher inhibition activity, which increased at the conclusion of the fermentation with the co-culture and reached 53.42%, was influenced by the higher peptide synthesis. These findings highlighted the significance of creating useful co-culture products. PB MDPI SN 2304-8158 YR 2023 FD 2023-06-20 LK https://hdl.handle.net/10347/43471 UL https://hdl.handle.net/10347/43471 LA eng NO Olvera-Rosales, L.B.; Pérez-Escalante, E.; Castañeda-Ovando, A.; Contreras-López, E.; Cruz-Guerrero, A.E.; Regal-López, P.; Cardelle-Cobas, A.; González-Olivares, L.G. ACE-Inhibitory Activity of Whey Proteins Fractions Derived of Fermentation by Lacticaseibacillus rhamnosus GG and Streptococcus thermophilus SY-102. Foods 2023, 12, 2416. https://doi.org/10.3390/ foods12122416 NO This research received no external funding DS Minerva RD 27 abr 2026