which of the following amino acids is involved in the formation of heme ?

Options

A. Tryptophan
B. Tyrosine
C. Glycine
D. Histidine

Answer

To determine which amino acid is involved in the formation of heme, we can follow these steps:

1. **Understand Heme Formation**: Heme is an essential component of hemoglobin and other heme-containing proteins. The synthesis of heme occurs primarily in the mitochondria of cells.

2. **Identify the Starting Materials**: The heme synthesis pathway begins with the condensation of succinyl coenzyme A (succinyl-CoA) and an amino acid.

3. **Recognize the Key Amino Acid**: The amino acid that condenses with succinyl-CoA to initiate heme synthesis is glycine. This reaction is facilitated by the cofactor pyridoxal phosphate.

4. **Conclusion**: Therefore, the amino acid involved in the formation of heme is glycine.

Final Answer: Glycine

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