Sourness-suppressing peptides in cooked pork loins

Area of Science:

• Food Science
• Sensory Science
• Biochemistry

Background:

• Sour taste perception is crucial in food quality.
• Identifying compounds that modulate taste perception is an active area of research.
• Pork processing involves various steps that can alter its biochemical composition.

Purpose of the Study:

• To identify peptides in cooked pork responsible for suppressing sourness.
• To elucidate the mechanism by which these peptides inhibit sour taste.
• To investigate the impact of these peptides on other taste sensations like umami and saltiness.

Main Methods:

• Pork loins were vacuum-cooked and conditioned.
• Extracts were fractionated based on molecular weight (MW).
• Sensory evaluation and peptide sequencing were performed.

Main Results:

• Fraction II (MW 500-1,000) showed the strongest sourness suppression.
• Three specific peptides, notably APPPPAEVHEV, were identified and increased during conditioning.
• This peptide inhibits sourness by preventing sour taste substances from binding to tongue membranes.
• Fraction II also enhanced umami and saltiness.

Conclusions:

• Specific peptides derived from cooked pork can effectively suppress sour taste.
• The mechanism involves interfering with the interaction between taste substances and lingual receptors.
• These findings have implications for developing food products with improved taste profiles.