Methionine (H-)
Cysteine (H+)
Hydrogen
Chalcogen Bond
Thiol
Sulfhydryl
Disulfide
Thioether
Homocysteine
thiol or sulfhydryl group (-SH).
thioether group (-S-CH₃)
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Methionine is an essential amino acid obtained from the diet and serves as a major source of sulfur for the body. It is a thioether, meaning its sulfur atom is bonded to two carbon atoms and does not have a bonded hydrogen.
Cysteine is a semi-essential amino acid that can be synthesized from methionine via the transsulfuration pathway. Cysteine is a thiol, containing a reactive sulfhydryl or thiol group (-SH). This thiol group allows it to form strong disulfide bonds, which are crucial for protein folding and stability.
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Nitrosating Agent
Nitrous Acid
glutamine pyrrolidone carboxylic acid ammonia Gluconate nitrate N-nitrosopyrrolidine Nitrosamines
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Glutamine metabolism and ammonia death: targeted modulation for enhanced cancer immunotherapy
https://pmc.ncbi.nlm.nih.gov/articles/PMC12484143/
Ammonia in cancer: dual roles and therapeutic strategies
RE: Intercellular Homeostasis