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I stilI still can't edit. What's up?
'''Selenocysteine''' is an [[amino acid]] that is present in several [[enzyme]]s ([[glutathione peroxidase]], [[tetraiodothyronine 5 deiodinase|tetraiodothyronine 5' deiodinase]], and [[formate dehydrogenase]] for example). Selenocysteine has a structure similar to [[cysteine]], but with an atom of [[selenium]] taking the place of the usual [[sulfur]]. Proteins that include a selenocysteine residue are called [[selenoprotein]]s.
==Yes, you can==
Unlike other amino acids present in biological [[protein]]s, however, it is not coded for directly in the [[genetic code]]. Selenocysteine is encoded in a special way by a UGA [[codon]], which is normally a stop codon. The UGA codon is made to encode selenocysteine by the presence of a [[SECIS element]] (SElenoCysteine Insertion Sequence) in the [[mRNA]]. The SECIS element is defined by characteristic nucleotide sequences and secondary structure base-pairing patterns. In [[eubacteria]], the SECIS element appears soon after the UGA codon. In [[archaea]] and in [[eukaryote]]s, the SECIS element is in the [[3' UTR]] of the mRNA, and can direct multiple UGA codons to encode selenocysteine residues. When cells are grown in the absence of selenium, translation of selenoproteins terminates at the UGA codon, resulting in a truncated, nonfunctional enzyme.
This account is not blocked. Please stop spamming your talk page. <span style="background-color:#000000"><font color="white">(|--</font></span> <span style="background-color:#CCCCCC">[[User talk:Ultimus|<font color="red">'''UlT</font><font color="green">i</font><font color="blue">MuS'''</font>]]</span> 00:17, 26 August 2006 (UTC)
Like the other amino acids used by cells, selenocysteine has a specialized [[tRNA]]. The primary and secondary structure of selenocysteine [[tRNA]] differ from those of standard tRNAs in several respects, most notably in having an 8-base pair acceptor stem, a long variable region arm, and substitutions at several well-conserved base positions.
No I can't, I just tried to make another account, and that one wasn't ok for some reason,so they told me to make another and now I still can't edit. What's going on here?
==Stop the spam==
Once again, please stop spamming your talk page, or you may lose the privelege of editing it. <span style="background-color:#000000"><font color="white">(|--</font></span> <span style="background-color:#CCCCCC">[[User talk:Ultimus|<font color="red">'''UlT</font><font color="green">i</font><font color="blue">MuS'''</font>]]</span> 00:21, 26 August 2006 (UTC)
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