45.下列那一項是Streptococcus pyogenes的superantigen?
(A)M-protein
(B)F-protein
(C)heat-labile toxin(speA)
(D)Streptolysin S
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統計: A(79), B(4), C(175), D(55), E(0) #1324542
統計: A(79), B(4), C(175), D(55), E(0) #1324542
詳解 (共 1 筆)
#4041152
superantigen:
自發性結合到T細胞受器(T cell receptor, TCR)之 V beta與主要組織相容性複合體(Major histocompatibility complex, MHC) II的分子,不需要經過抗原呈現的步驟,直接造成大量T細胞增生,會產生許多細胞激素(cytokines)
毒素:
Staphylococcus aureus(金黃色葡萄球菌):
Enterotoxins、
Toxic shock syndrome toxin-1(TSST-1)、
Streptococcus pyogenes(化膿性鏈球菌):
Pyrogenic Exotoxins(發紅毒素)
Streptococcal pyrogenic exotoxins A (SpeA) and C (SpeC) are members of a family of superantigens (C)heat-labile toxin(speA)
Staphylococcus aureus(金黃色葡萄球菌):
Enterotoxins、
Toxic shock syndrome toxin-1(TSST-1)、
Streptococcus pyogenes(化膿性鏈球菌):
Pyrogenic Exotoxins(發紅毒素)
Streptococcal pyrogenic exotoxins A (SpeA) and C (SpeC) are members of a family of superantigens (C)heat-labile toxin(speA)
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