Email updates   Research highlight  Interesting things come in
small packages  Edward F DeLong  Author affiliations  Department
of Biological Engineering and Department of Civil and
Environmental Engineering, Massachusetts Institute of
Technology, Cambridge, MA 02138, USA  Citation and License
Genome Biology 2010, 11:118  doi:10.1186/gb-2010-11-5-118
Published:14 May 2010  © 2010 BioMed Central Ltd   Population
metagenomics reveals the reduced metabolic capacities of a
marine nitrogen-fixing cyanobacterium that lacks many of the
signature features of typical cyanobacteria.  Research highlight
In life, it's said that few things are certain except death and
taxes. Similarly, in biology, while there are exceptions to many
'rules', there do seem to be a few certainties that have stood
the test of time. One of these is the general organization and
structure of the photosynthetic apparatus in chlorophyll-
containing green plants and cyanobacteria, in which the
photosynthetic electron-transport chain consists of