الفهرس 
ContentsOnly 14 pages are availabe for public view
 |  | from | 154 |  |  |
| | | from | 154 | | |
Abstract
Selenocysteine(sec)is recognized as the 21st naturally occuring amino acid in protein. The expansion of the genetic code to include sec(bock et al.,1991a)was the first addition to the code since the time it was deciphered and shown to be universal in the mid 1960s(knorana et al,1966;nirenberg et al.,1966;marshall et al;1967)sec occurs at the active site.