5. When meat is cooked, protein breaks down, as shown below. The degraded protein is able to undergo a Maillard reaction with glucose released from the breakdown of muscle glycogen. Using the structures below, explain how the proteins is "breaking down" and why this facilitates a Maillard reaction with the glucose. SH this peptide is part of a larger protein SH CH, CH2 NH но CH heat or enzymes °C NH2 and and water (H,0) ČH, CH2 H2C CH3 H2C CH3 CH3 ČH3 OH OH
Carbohydrates
Carbohydrates are the organic compounds that are obtained in foods and living matters in the shape of sugars, cellulose, and starch. The general formula of carbohydrates is Cn(H2O)2. The ratio of H and O present in carbohydrates is identical to water.
Starch
Starch is a polysaccharide carbohydrate that belongs to the category of polysaccharide carbohydrates.
Mutarotation
The rotation of a particular structure of the chiral compound because of the epimerization is called mutarotation. It is the repercussion of the ring chain tautomerism. In terms of glucose, this can be defined as the modification in the equilibrium of the α- and β- glucose anomers upon its dissolution in the solvent water. This process is usually seen in the chemistry of carbohydrates.
L Sugar
A chemical compound that is represented with a molecular formula C6H12O6 is called L-(-) sugar. At the carbon’s 5th position, the hydroxyl group is placed to the compound’s left and therefore the sugar is represented as L(-)-sugar. It is capable of rotating the polarized light’s plane in the direction anticlockwise. L isomers are one of the 2 isomers formed by the configurational stereochemistry of the carbohydrates.
![**Transcription for Educational Website:**
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**5. Understanding Protein Breakdown During Cooking and the Maillard Reaction**
When meat is cooked, protein breaks down, as illustrated below. The degraded protein undergoes a Maillard reaction with glucose released from the breakdown of muscle glycogen. Using the structures below, we will explore how proteins break down and why this facilitates a Maillard reaction with glucose.
**Chemical Structure Breakdown:**
1. **Initial Structure:**
- The image shows a peptide that is a part of a larger protein. It includes typical peptide bonds connecting various amino acids.
2. **Process Description:**
- The peptide undergoes a breakdown process facilitated by heat or enzymes and the presence of water (H₂O).
3. **Resulting Structures:**
- Two distinct structures emerge after the breakdown.
- The first molecule includes C, H, N, O, and S atoms, with functional groups indicating amino and carboxyl ends and an SH (thiol) group.
- The second molecule also contains C, H, N, and O atoms, with distinct carboxyl and amino groups, indicating separate amino acid structures.
**Diagram Explanation:**
- The diagram details the peptide chain with various functional groups highlighted.
- An arrow indicates the transformation of the peptide under heat/enzymes and water to yield smaller molecules.
- The resulting structures reveal how distinct functional groups are exposed or altered, which may react further during the Maillard reaction.
The degradation of proteins in cooking facilitates the Maillard reaction by exposing reactive sites, such as amino groups, which can interact with glucose, leading to the complex flavors and colors associated with cooked meat.
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This explanation is designed to help learners understand the biochemical processes involved in cooking meat and the implications for flavor development.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2ef80673-734c-41a5-a14e-c7bbb61c7145%2F07b30d6f-7358-4e2d-8cab-d3b860148f9e%2Fphqxvxn_processed.png&w=3840&q=75)
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