A1258689740svoFh

1
Translation
AUGGGGUUUGGC
MGUG
polypeptide
mRNA
2
Whats needed?
mRNA
tRNAs
ribosome
3
mRNA
many aa codons
cap
UAG
AUG
(A)n
size usually 500 - 5000 nt
4
tRNA
acceptor arm
about 80 nt
contains unusual bases
pseudouracil (?)
D loop
dihydrouracil (D)
? loop
(T)
methyluracil
anticodon loop
Kenyon College
5
Kenyon College
Thinkquest
6
charging of tRNAs
aminoacyl tRNA
carboxyl group of aa connected to 3 OH of tRNA
7
specificity of aa tRNA synthetases
many amino acids have more than one tRNA
8
rRNAs
? half of all RNA in the cell
of ribosomes very large (? 106 in a large cell)