Proteins generally contain sulfur but lack phosphorus.
Is it true that proteins generally contain sulfur but lack phosphorus?
Proteins generally contain sulfur (found in the amino acids cysteine and methionine) but lack phosphorus as part of their standard biochemical composition, making this a matter of common scientific knowledge.
Verdict: COMMON KNOWLEDGE · 0 sources for, 0 against · Last checked
The claim states that proteins generally contain sulfur but lack phosphorus. This is a fundamental biochemical fact based on the elemental composition of amino acids and standard protein structures; sulfur is present in cysteine and methionine, whereas phosphorus is typically a component of nucleic acids, lipids, and phosphorylated proteins rather than the canonical protein backbone. Because this is a well-established textbook fact of biochemistry, it falls under common knowledge and does not require citation to specific papers.
What does the evidence say?
The claim states that proteins generally contain sulfur but lack phosphorus. This is a fundamental biochemical fact based on the elemental composition of amino acids and standard protein structures; sulfur is present in cysteine and methionine, whereas phosphorus is typically a component of nucleic acids, lipids, and phosphorylated proteins rather than the canonical protein backbone. Because this is a well-established textbook fact of biochemistry, it falls under common knowledge and does not require citation to specific papers.
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