Codon-anticodon interaction

we can see the anticodon arm of tRNA^Phe (the same studied before):

Backbone (imaginary line connecting the phosphates).
Stem (nucleotides with paired bases).
Loop (nucleotides with unpaired bases), except the
anticodon (^mG-A-A triplet)
(^mG is O2'-methylguanosine-5'-monophosphate)

Now let's a molecular model of the interaction between this anticodon (^mG-A-A on tRNA) with an UUU codon (on mRNA).
To better differentiate them, the carbon atoms in tRNA and in mRNA have been coloured.

(Since the methyl group in ^mG is on the pentose, it does not affect pairing, and ^mG pairs like G.)
(The complementary codon would be UUC, but thanks to wobbling it is also possible to pair with UUU; these are called synonymous codons, and both code for Phe; this is an example of the degeneration of the genetic code.)

Note the hydrogen bonds between bases in codon and anticodon, as well as their confrontation and coplanarity.