RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription.NA polymerases have been found in all species, but the number and composition of these proteins vary across taxa. For instance, bacteria contain a single type of RNA polymerase, while eukaryotes (multicellular organisms and yeasts) contain three distinct types.
1 A Federal Employees' Retirement System (FERS) employee (generally if you were hired on or after January 1, 1984), or.  A Civil Service Retirement System (CSRS) employee (generally if you were hired before January 1, 1984 and did not convert to FERS), or.
and postal employees hired on or after Jan. 1, 1984, for-. mer Civil Service Retirement System employees who trans -. ferred into FERS during the two special transfer open seasons. (in 1987 and 1998) held since the creation of FERS, and former. CSRS employees who switched into FERS following a separa-. tion from federal service.