Possible Interaction: Sodium Chloride and Tryptophan

“An increase in salt content caused higher oxidation of tryptophan and protein carbonylation with a decrease in Schiff bases (P < 0.05) and a slight decrease in lipid oxidation (P < 0.05).”

“Higher levels of NaCl (>4.0%) with d-Trp (>20 mM) resulted in higher and more consistent growth inhibition of both Vibrio spp.”

“Treatment with 40 mM d-Trp significantly (P < 0.05) reduced viable V. parahaemolyticus cell counts in tryptic soy broth (TSB) with >4.0% NaCl at 25°C.”

“Thus, NaCl stimulated the intensity of the intrinsic tryptophan fluorescence of Go alpha with bound guanosine 5'-(3-O-thio)triphosphate (GTP gamma S) and GTP, but not GDP.”

“Even at the same level of osmotic pressure, d-tryptophan in conjunction with sodium chloride (NaCl) had a stronger inhibitory effect on the growth of Escherichia coli than that obtained by incubation with potassium chloride (KCl) and sucrose.”

“Moreover, the higher the NaCl concentration, the lower the concentration of d-tryptophan that was needed to inhibit bacterial growth.”

“At pH 3.0 and 5.0, the fluorescence intensity (FI) was greater … at pH 7.0 and 9.0, which suggests that the microenvironment of tryptophan was less hydrophilic …. Addition of NaCl also led to increased FI, an indication of … of tryptophan in response to the hydrophilic environment.”

“With an increase in NaCl concentration, the normalized volume percentages of tyrosine and tryptophan region increase, while those of humic- and fulvic-acid-like region decrease significantly.”

“Further, the intrinsic tryptophan fluorescence of the purified rice enzyme is altered in vitro with increasing NaCl concentration which could be prevented by preincubation with inositol.”

“The degree of encapsulation of tryptophan in the w/o/w emulsion increased with the concentration of sodium chloride added in the inner aqueous phase, while it decreased with that in the outer aqueous phase.”