A conserved N-terminal threonine is involved in catalysis at each active site.
2
The kinase phosphorylates the CDKs on a threonine residue which lies within the activation segment, a modification essential for generating kinase activity.
3
This enzyme is believed to be involved in the biosynthesis of isoleucine in methanogens and possibly other species lacking threonine dehydratase.
4
In this particular exercise we want to find all genes involved in the widest sense in the threonine metabolism.
5
Plks have a threonine in the activation segment whose phosphorylation is essential for activity.