Should RGS (regulator of G protein signaling) proteins be classified as GEFs (guanine nucleotide exchange factors) or GAPs (GTPase activating proteins) Explain what role this activity plays in modulating G-protein-mediated responses in animals and yeasts.
【参考答案】
a. 从冷水湖中分离的细菌的细胞质膜具有较多的不饱和脂肪酸, b. 来自温泉细胞的质膜中含有较多长链脂肪酸。 ......