tRNA(Trp) + D-tryptophan => D-tryptophanyl-tRNA(Trp) + H2O
trna(trp) + d-tryptophan => d-tryptophanyl-trna(trp) + h2o
tRNA(Trp) + D-tryptophan => D-tryptophanyl-tRNA(Trp) + H2O
trna(trp) + d-tryptophan => d-tryptophanyl-trna(trp) + h2o