preferred_name: a tRNA with a 3' CCA end + 2 CTP + ATP <=> a tRNA with a 3' CCACCA end + 3 diphosphate
preferred_name_lc: a trna with a 3' cca end + 2 ctp + atp <=> a trna with a 3' ccacca end + 3 diphosphate
label: a tRNA with a 3' CCA end + 2 CTP + ATP <=> a tRNA with a 3' CCACCA end + 3 diphosphate
label_lc: a trna with a 3' cca end + 2 ctp + atp <=> a trna with a 3' ccacca end + 3 diphosphate