user806: I was just retagging How do nuclear receptors locate each other to form a DNA loop and wanted to add gene-regulation. That didn't exist, but I found regulation. That sounds a bit too generalised to me (regulation of enzymes/genes/acidity/potential/...?).
So I was wondering: A) is there a different way than asking on meta to propose renaming a tag or adding a synonym? B) Should that one be renamed to gene-regulation because that's what it is at the moment? Otherwise I would make the tag wiki for it something like "Questions about regulation mechanisms such as gene regulation, 

user810: There were only two such tags, I changed them both. 
I agree that regulation is too general: it even says on create tags permissions page that meta tags (tags which can't stand on their own) aren't allowed. 
You already have the rep to create tags, just re-tag your question gene-regulation. Creating a tag synonym from general --> specific seems dangerous, though, and since this one was only used on two questions, I don't think we need to create a synonym. 

806: <p>I was just retagging <a href="https://biology.stackexchange.com/questions/2181/how-do-nuclear-receptors-locate-each-other-to-form-a-dna-loop">How do nuclear receptors locate each other to form a DNA loop</a> and wanted to add <a href="https://biology.stackexchange.com/questions/tagged/gene-regulation" class="post-tag" title="show questions tagged &#39;gene-regulation&#39;" rel="tag">gene-regulation</a>. That didn't exist, but I found <a href="https://biology.stackexchange.com/questions/tagged/regulation" class="post-tag" title="show questions tagged &#39;regulation&#39;" rel="tag">regulation</a>. That sounds a bit too generalised to me (regulation of enzymes/genes/acidity/potential/...?).</p>

<p>So I was wondering: A) is there a different way than asking on meta to propose renaming a tag or adding a synonym? B) Should that one be renamed to <a href="https://biology.stackexchange.com/questions/tagged/gene-regulation" class="post-tag" title="show questions tagged &#39;gene-regulation&#39;" rel="tag">gene-regulation</a> because that's what it is at the moment? Otherwise I would make the tag wiki for it something like "Questions about regulation mechanisms such as gene regulation, </p>
 810: <p>There were only two such tags, I changed them both. </p>

<p>I agree that <a href="https://biology.stackexchange.com/questions/tagged/regulation" class="post-tag" title="show questions tagged &#39;regulation&#39;" rel="tag">regulation</a> is too general: it even says on <a href="https://biology.stackexchange.com/privileges/create-tags">create tags</a> permissions page that meta tags (tags which can't stand on their own) aren't allowed. </p>

<p>You already have the rep to create tags, just re-tag your question <a href="https://biology.stackexchange.com/questions/tagged/gene-regulation" class="post-tag" title="show questions tagged &#39;gene-regulation&#39;" rel="tag">gene-regulation</a>. Creating a tag synonym from general --> specific seems dangerous, though, and since this one was only used on two questions, I don't think we need to create a synonym. </p>
