Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

4. Protein Structure

Approximating Protein Mass

Biochemistry

4. Protein Structure

Approximating Protein Mass

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Multiple Choice

Myoglobin is an oxygen-storage protein in muscle tissues. If its molecular weight is 16.7 kDa (1 Da = 1 g/mol), about how many amino acid residues does myoglobin have?

134

208

153

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Verified step by step guidance

Understand that myoglobin is a protein composed of amino acid residues, and its molecular weight is given as 16.7 kDa.

Recall that the average molecular weight of an amino acid residue is approximately 110 Da (Daltons). This is a commonly used approximation in biochemistry.

To estimate the number of amino acid residues in myoglobin, divide the total molecular weight of myoglobin by the average molecular weight of an amino acid residue: \( \text{Number of residues} = \frac{16,700 \text{ Da}}{110 \text{ Da/residue}} \).

Perform the division to find the approximate number of amino acid residues in myoglobin. This will give you a rough estimate of the number of residues.

Compare your calculated result with the given options (86, 134, 208) to determine which is closest to your estimate.