# M protein

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> Markdown URL: https://mediated.wiki/source/M_protein.md
> Source: https://en.wikipedia.org/wiki/M_protein
> Source revision: 1043442414
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

**M protein** may refer to:

- [M protein (Streptococcus)](/source/M_protein_(Streptococcus)), a virulence factor of the bacterium *Streptococcus pyogenes*
- [Viral matrix protein](/source/Viral_matrix_protein), structural protein linking the viral envelope with the virus capsid
- [Coronavirus membrane protein](/source/Coronavirus_membrane_protein), structural protein expressed from the M gene in coronaviruses
- [Myeloma protein](/source/Myeloma_protein), also called paraprotein, an abnormal protein in the urine or blood, often seen in multiple myeloma or monoclonal gammopathy of undetermined significance
- [MYOM2](/source/MYOM2) (Myomesin-2), a protein composing the M-line of muscle cell sarcomeres
- [Protein M](/source/Protein_M), immunoglobulin-binding protein found on the surface of the bacterium *Mycoplasma genitalium*

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Adapted from the Wikipedia article [M protein](https://en.wikipedia.org/wiki/M_protein) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/M_protein?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.