a tRNA with a 3' CCA end + diphosphate => a tRNA with a 3' CC end + ATP
a trna with a 3' cca end + diphosphate => a trna with a 3' cc end + atp
a tRNA with a 3' CCA end + diphosphate => a tRNA with a 3' CC end + ATP
a trna with a 3' cca end + diphosphate => a trna with a 3' cc end + atp