2. Genetic code and ribosomes

Figure 15

Figure 15

2.3 Ribosomes

2.3.1 Structure (continued)

c. Binding sites of mRNA and tRNA

  • mRNA lies between the two subunits.

  • tRNA lies between the two subunits, where 3 binding sites are possible:

    • A-site (aminoacyl-tRNA) : entry site for tRNA

    • P-site (peptidyl-tRNA)

    • E-site: exit site for tRNA