TY - RPRT TI - Expanding the genetic code. AU - Lei Wang AU - Jianming Xie AU - Peter G Schultz PY - 2006 DO - 10.1146/annurev.biophys.35.101105.121507 UR - https://pubmed.ncbi.nlm.nih.gov/16689635/ ID - 16689635 ER -