Assertion: codon's base | /r/HasProperty | modified
Facets:
value: chemically
type: MANNER
Source sentences:
text: Some anti-codons have modified bases that can pair with more than one codon, specifying the same amino acid; this means that we don't need 61 different tRNA molecules for all 61 codons.
text: Bases that have been chemically modified can occur at various locations throughout the tRNA molecule.