TY  - RPRT
TI  - A chemical toolkit for proteins--an expanded genetic code.
AU  - Jianming Xie
AU  - Peter G Schultz
PY  - 2006
DO  - 10.1038/nrm2005
UR  - https://pubmed.ncbi.nlm.nih.gov/16926858/
ID  - 16926858
ER  -