分子体积更小(MW: 217.27); 细胞壁和细胞膜穿透性能更好,水溶液中溶解度更高; 良好空间特异性和更高覆盖度,使APEX标记效率提高一个数量级(图1)。
图3 APEX2-Mediated Alk-Ph Labeling of the Mitochondrial Transcriptome[6]. (A) Scheme of RNA labeling in yeast. (B) Real-time-PCR analysis of mitochondrial RNA enrichment elative to the cytoplasmic RNA markers, ACT1 and THD3.