vstr18a at sfsuvax1.sfsu.edu (Kathleen Anderson) wrote:
>Does anyone know of any protists who do not possess nuclear
>pore complexes characteristic of Dictyostelium, yeasts, and
>metazoans?
I don't know of any that lack them but microsporidia and Giardia,
which are representatives of two of the earliest branching
eukaryotic lineages, both have nuclear pores. This would mean
that protists lacking them would have to have lost them
secondarily. As nuclear pores appear crucial for the movement
of RNAs out of and proteins into the nucleus I think this unlikely.
Graham
________________________________________________________
C. Graham Clark, Ph.D.
Laboratory of Parasitic Diseases,
National Institutes of Health,
Bethesda, MD 20892
Ph.: 301-496-4740
FAX: 301-402-4941
e-mail: cge at cu.nih.gov
