Selenium accumulation by Lactobacillus isolated from commercial fermented milk: minimum inhibitory concentration and kinetic growth changes

Abstract

totales del petróleo intemperizados en suelos y sedimentos (Biodegradation modeling of sludge bioreactors of total petroleum hydrocarbons weathering in soil and sediments)

Differences in the Proteolytic System of Lactic Acid Bacteria Affect the Release of DPP-IV Inhibitory Peptides from Whey Proteins

“…These kinetic parameters are intended to somehow explain the metabolic behavior of microorganisms according to the environment in which they are found. Castañeda-Ovando et al [16] related the growth of lactic bacteria in monoculture and co-culture to determine the fundamental differences in the process. Thus, the two main metabolic identification parameters are proteolytic capacity and lactic acid production.…”

“…It has been reported that in lactic acid bacteria, proteolytic activity and protein hydrolysis patterns vary considerably between strains [15,16]. These differences could be due to multiple factors, among which the following have been pointed out: (1) changes and mutations in the genes involved in the proteinase expression linked to the cell wall, and (2) the conditions in which the enzymatic activity is carried out [17].…”

“…In this sense, various studies have indicated that S. thermophilus strains require the incorporation of amino acids such as methionine and glutamine, thus satisfying their auxotrophies while releasing peptides and amino acids to the medium, which is not metabolically necessary [18,19]. It has been reported that in lactic acid bacteria, proteolytic activity and protein hydrolysis patterns vary considerably between strains [15,16]. These differences could be due to multiple factors, among which the following have been pointed out: (1) changes and mutations in the genes involved in the proteinase expression linked to the cell wall, and (2) the conditions in which the enzymatic activity is carried out [17].…”