[Nucleic acid components in carbohydrate-rich food]

Area of Science:

• Food science and nutrition
• Biochemistry

Context:

• Investigated nucleic acid component content in various foods, particularly carbohydrate-rich options.
• Quantified purines and pyrimidines as nucleic acid equivalents (RNA or DNA) and IMP from hypoxanthine.
• Analyzed both cultivated plants and fungi for their nucleic acid profiles.

Purpose:

• To determine and compare the nucleic acid component levels in a wide range of food items.
• To identify food sources with significant purine and pyrimidine content.
• To understand the impact of food processing (e.g., yeast addition) on nucleic acid content.

Summary:

• High RNA-equivalent content was observed in cereals, pulses, and vegetables (spinach, leek, broccoli, Chinese cabbage, cauliflower).
• Mushrooms (oyster, flat, button, cep) also exhibited substantial nucleic acid content.
• Vegetarian instant meals with added autolysed or hydrolysed yeast showed a marked increase in purine content.
• Resting cell tissues (e.g., seeds) contain high-molecular-mass nucleic acids, while growing tissues (e.g., soybean sprouts) have both nucleic acids and lower-molecular-mass compounds.

Impact:

• Provides valuable data for nutritional assessments and dietary recommendations, especially for purine intake.
• Highlights the contribution of plant-based foods and mushrooms to dietary nucleic acids.
• Informs food manufacturers about the purine content implications of using yeast derivatives in vegetarian products.