Description

• Application: Exploring the molecular mechanisms of Lrp/AsnC-type transcription regulator DecR, an L-cysteine-responsive feast/famine regulatory protein.: This study delves into the role of DecR, an L-cysteine-responsive regulatory protein, in modulating bacterial response to nutrient availability, offering insights into microbial metabolism and potential targets for antibacterial strategies (Zhou et al., 2024).
• Analysis Note: Assay (perchloric acid titration, calculated on dried substance): ≥ 99.0Identity (IR-spectrum): passes testAppearance: colorless to white, needle-shaped crystalsAppearance of solution (100 g/l, hydrochloric acid  2 mol/l): clear and colorlessSpec. rotation (α 20/D, 80 g/l, hydrochloric acid 1 mol/l, calc.on dried substance): +8.3 to +9.5pH (25 g/l; CO₂-free water): 4.5 - 5.5Chloride (Cl): ≤ 0.04 %Sulfate (SO₄): ≤ 0.03 %Heavy metals (as Pb): ≤ 0.001 %As (Arsenic): ≤ 0.0001 %Ca (Calcium): ≤ 0.001 %Co (Cobalt): ≤ 0.0005 %Fe (Iron): ≤ 0.0010 %K (Potassium): ≤ 0.0005 %Mg (Magnesium): ≤ 0.0005 %Na (Sodium): ≤ 0.01 %NH₄ (Ammonium): ≤ 0.02 %Zn (Zinc): ≤ 0.0005 %Foreign amino acids: ≤ 0.5 %Other ninhydrine positive substances: ≤ 0.1 %Loss on drying (105 °C; 3 h): ≤ 0.5 %