Translation initiation.
<Li> The  small  ribosomal  subunit binds to several initiation factors
(IF1, 2, 3); this complex binds to mRNA.
<Li> Initiator  tRNA^fmet  binds  to mRNA AUG codon in the P (peptidyl)
site GTP is hydrolyzed to provide energy for the reactions.
<Li> Large  subunit binds to complex. Elongation factor Tu binds to the
next tRNA, facilitating entry into the A (aminoacyl) site.