| Full text | |
| Author(s): |
Vasconcellos, Alenia Naliato
;
Santos, Arthur Firmino de Macedo
;
Vaz, Andreia Cristina Nakashima
;
da Fonseca, Danielle de Cassia Martins
;
da Cruz, Marcia Delgado
;
Marino, Elizangela Domenis
;
Oliveira, Luisa Maria Ferreira de Sousa
;
Chequer, Thais Naliato
;
Vidal, Ana Maria Centola
Total Authors: 9
|
| Document type: | Journal article |
| Source: | INTERNATIONAL DAIRY JOURNAL; v. 169, p. 6-pg., 2025-10-01. |
| Abstract | |
The properties of A2 milk are currently under debate, with limited information available on the action of microbial proteases in milk from cows with different beta-casein genotypes. The study aimed to experimentally contaminate milk from cows with A1A1, A1A2, and A2A2 beta-casein genotypes with Bacillus cereus s.s. and Pseudomonas fluorescens and to quantify CMP at different incubation times in order to determine whether the three genotypes influence the microbial degradation of kappa-CN. There was an increase in the concentration of free CMP over time, regardless of genotype or treatment. The A1A1 genotype showed a lower rate of kappa-CN degradation and a lower concentration of free CMP. The degradation by Pseudomonas fluorescens was slower than that by Bacillus cereus s.s. These results demonstrate the influence of genotypes on the microbial degradation of kappa-CN, suggesting that A2 milk, despite its enhanced digestibility, may be more susceptible to degradation by microbial proteases. (AU) | |
| FAPESP's process: | 19/09583-5 - Protein profile and milk proteome with contrasting genotypes for the ²-casein gene and verification of the proteolytic action of Bacillus cereus s.s. and Pseudomonas fluorescens and technological treatments applied to milk on the production of BCM7 |
| Grantee: | Ana Maria Centola Vidal |
| Support Opportunities: | Regular Research Grants |