tRNA secondary structrue Amino acid (alanine) Acceptor stem G G D lOop TcG loop mG GXA CAXGXGXCXO XOXO Variable loop Anticodon loop Anticodon Codon mRNA
tRNA secondary structrue
tRNA Amino acid 3′ 5′ attachment site 3′ 5 HYdrogen bonds between paired bases Anticodon
tRNA
tRNA Amino Acid Acce ptor Stem D Loop TIC Loop Anticodon Loop
tRNA
G2 transcription in prokaryotes hree phases of transcription 1. Promoters and initiation起始 2. Elongation延伸 3. Termination终止 RNA processing加工
• Three phases of transcription 1. Promoters and initiation起始 2. Elongation延伸 3. Termination终止 • RNA processing加工 G2 transcription in prokaryotes
Template strand nonlemplate strand (+)strand coding strand 5 3 ATG TAG Same sequence AUG UAG Start 5 3'RNA codon TAC ATC 5 template strand-strand
3’ 5’ 5’ 3’RNA template strand nontemplate strand (+) strand (-) strand 5’ 3’ coding strand AUG ATG TAC UAG TAG ATC Start codon Same sequence Template strand