Redox dynamics of later Cambrian oceans

The Cambrian Ecotone: Dynamics of a Major Evolutionary Discontinuity

The Cambrian conundrum: early divergence and later ecological success in the early history of animals.

Diverse bilaterian clades emerged apparently within a few million years during the early Cambrian, and various environmental, developmental, and ecological causes have been proposed to explain this abrupt appearance. A compilation of the patterns of fossil and molecular diversification, comparative developmental data, and information on ecological feeding strategies indicate that the major anim...

Biogeochemical cycling through the Neoproterozoic-Cambrian transition in China: an integrated study of redox-sensitive elements

Cambrian Lattices

For an arbitrary finite Coxeter group W , we define the family of Cambrian lattices for W as quotients of the weak order on W with respect to certain lattice congruences. We associate to each Cambrian lattice a complete fan, which we conjecture is the normal fan of a polytope combinatorially isomorphic to the generalized associahedron for W . In types A and B, we obtain, by means of a fiber-pol...

Dynamics in transient complexes of redox proteins.

Recent studies have provided experimental information about the initial stage of protein complex formation, the encounter complex. This stage is particularly important in the weak and transient complexes formed between electron transfer proteins and their partners. These studies are discussed and the role of the encounter complex is interpreted in terms of the specific requirements that the bio...