What Is The Difference Between Peptides And Steroids?

Peptides and steroids are two distinct classes of bioactive molecules that play crucial roles in regulating various physiological processes. While they share some similarities, they differ significantly in their structure, function, and mode of action.

### Peptides vs. Steroids
Peptides are chains of amino acids held together by peptide bonds, which form a backbone structure. They can be small, like dipeptides or tripeptides, or longer chains. Some peptides act as hormones, signaling molecules that regulate bodily functions. Examples include Substance P, Angiotensinogen, and Endothelin-1.

Steroids, on the other hand, are lipids with a rigid, four-ring structure. They have diverse biological activities and are categorized into different types based on their functional groups. Some steroids, like PAR-4 (N-(1-amide) mouse), play roles in inflammation and immune response.

### Conclusion
In summary, peptides and steroids are both critical for maintaining homeostasis in the body but function through distinct mechanisms. Peptides operate primarily as signaling molecules, while steroids act as hormones or have regulatory functions. Understanding these differences is essential for grasping their unique roles in biology.

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- Substance P
- PAR-4 (1-(mouse)
- Substance P
- Angiotensinogen (1-, Rat)
- c(RGDfV)
- Substance P
- Endothelin-1, human
- PAR-4 (1-amide (mouse))
- Ac-IEAR-pNA
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References: JBHNews .