Koyama Y., Furukawa K. 1990
Koyama Y., Furukawa K. 1990. Cloning and sequence analysis of tryptophan synthetase genes of an extreme thermophile, Thermus thermophilus HB27: plasmid transfer from replica-plated Escherichia coli recombinant colonies to competent T. thermophilus cells. J Bacteriol 172: 3490-3495.
