TY - RPRT TI - [Mutant tRNA His ineffective in repression and lacking two pseudouridine modifications]. AU - C E Singer AU - G R Smith AU - R Cortese AU - B N Ames PY - 1972 DO - 10.1038/newbio238072a0 UR - https://pubmed.ncbi.nlm.nih.gov/4558263/ ID - 4558263 ER -