Variants of {TAIL ~ thymidine kinase}, {HEAD ~ nucleic acids} encoding them, and methods of using them 
Variants of { TAIL ~ thymidine kinase } , { HEAD ~ nucleic acids } encoding them , and methods of using them
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH