45.下列那一項是Streptococcus pyogenes的superant..-阿摩線上測驗
1F MORRIS M114 高一上 (2020/06/06)
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) |