Since the topic is vast and little is really understood, we will mainly restrict our review to two species, Hydra vulgaris, a simple sweetwater polyp and zebrafish (Danio rerio) as a more complex representative belonging to the vertebrates.
The E. coli hyf operon encodes hydrogenase-4 [18], an integral-membrane complex representative of the H2-evolving or group-4 hydrogenases, previously identified in and restricted to anaerobic bacteria [11].
The NHANES is a complex, nationally representative sample of the entire non-institutionalized United States population, now conducted in continuous bi-annual waves by the Centers for Disease Control and Prevention [21].
But it has been difficult to adapt these simple systems to the study of blood flow dynamics in more complex, representative geometries.
Individual fluorescence spots showed single- or multi-step decreases in fluorescence intensity corresponding to photobleaching of individual YFP molecules in a single complex (a representative schematic of the photobleaching analysis is shown in Figure 3Aa).
The most evolutionary complex representatives within this clade are those capable of cell differentiation, the Nostocales (highlighted in green in Figure 1).
In order to fingerprint the composition of these complexes, representative subunits were examined by immunoblots (Fig. 9).
In this study the formation of ternary complexes representative of different steps of receptor recognition and docking was studied using recombinant Arabidopsis proteins and domains.
A complex model which is representative of an agile combat aircraft has been developed, and a Kalman filter has been designed to reduce the effects of structural coupling.
These results, obtained in a complex mountainous area, are representative of Alpine environments and allow us to infer that similar (or better) results could also be obtained within non mountainous areas.
