flagellin

noun
fla·gel·lin | \flə-ˈje-lən \

Definition of flagellin 

: a polymeric protein that is the chief constituent of bacterial flagella and that determines the specificity of the flagellum in eliciting an immune response

First Known Use of flagellin

1955, in the meaning defined above

History and Etymology for flagellin

flagellum + -in entry 1

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The first known use of flagellin was in 1955

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flagellin

noun
fla·gel·lin | \flə-ˈjel-ən \

Medical Definition of flagellin 

: a polymeric protein that is the chief constituent of bacterial flagella, that forms helical chains around the hollow core of the flagellar filament, that determines the specificity of the flagellum in eliciting an immune response by its amino acid sequence, and that within any one serogroup can vary between two antigenic states by switching between the expression of two different genes

More from Merriam-Webster on flagellin

Britannica.com: Encyclopedia article about flagellin

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