Homocyteine is a naturally occurring, not proteinogenic alpha-amino acid.

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Can animals absorb atmospheric sulfur?

This is a follow up to this previous question: In biosynthesis of cysteine and methionine, where does the sulfur come from? Can animals use gaesous H2S in the atmosphere, say for instance from a ...
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Why is elevated homocysteine considered a risk factor for angina?

Elevated homocysteine levels are listed among risk factors for angina. How is homocysteine related to the heart? Or the coronary arteries? How do these relationships make it a risk factor for angina? ...
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By what mechanism does elevated homocysteine level accelerate thrombin formation?

It has been stated that elevated homocysteine level accelerates thrombin formation. By what mechanism does this happen?