Which of the Following Is Not a Characteristic of Immunoproteasomes

question 34

Multiple Choice

Which of the following is not a characteristic of immunoproteasomes?

• A)They make up about 1% of cellular protein.
• B)They consist of four rings of seven polypeptide subunits that exist in alternative forms.
• C)They are produced in response to IFN-γ produced during innate immune responses.
• D)They produce a higher proportion of peptides containing acidic amino acids at the carboxy terminus compared with constitutive proteasomes.
• E)They contain 20S proteasome-activation complexes on the caps.

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