TY - RPRT TI - Measuring adaptation within the genetic code. AU - S J Freeland AU - R D Knight AU - L F Landweber PY - 2000 DO - 10.1016/s0968-0004(99)01531-5 UR - https://pubmed.ncbi.nlm.nih.gov/10664579/ ID - 10664579 ER -