武汉大学生命科学学院：《分子生物学》（英文版）第七章 RNA Processing 第三节 mRNA Processing, hnRNPs and snRNPs 第四节 Alternative mRNA processing

0 CHa HN thyl- osIne H2N N H -P=0 OH OH 5, 5-Triphosphate link P|olC 0-P=O H SKH H 0 OCH Sometimes methylated CH2O、Base HH OCH:Sometimes methylated 0-P=0

5′ End ofrna with triphosphate group pppNp phosphohydrola ppP G GTP guanylyltransferase PP GpppNp adoMet guanine-7-methyltransferase docy m'GpppNp adoMet 2-O-methyltransferase adoho m'GpppmNp (b) 5 End of RNA with cap