Was life on the early Earth purple?

Early life forms on Earth may have been able to generate metabolic energy from sunlight using a purple-pigmented molecule called retinal that possibly predates the evolution of chlorophyll and photosynthesis. If retinal has ...

How nutrients are removed in oxygen-depleted regions of the ocean

In the course of global climate change, scientists are observing the increase of low-oxygen areas in the ocean, also termed oxygen minimum zones (OMZs). Large-scale OMZs exist, for example, in the Pacific off the coast of ...

Flavins keep a handy helper in their pocket

In human cells, vitamins often serve as the precursors of cofactors—non-proteins that are an essential part of enzymes. Among them are the flavins, derived from vitamin B2.

Key player in cell metabolism identified

Researchers from the Genomic Instability and Cancer Laboratory at Institute for Research in Biomedicine (IRB Barcelona) have identified a key role for EXD2 in protein production in the mitochondria, the cellular organelles ...

Blast of thin air can reset circadian clocks

We might not think of our circadian clock until we are jetlagged, but scientists continue to puzzle over what drives our biological timepiece. Now, a study published October 20 in Cell Metabolism has found that variations ...

Chemistry in mold reveals important clue for pharmaceuticals

In a discovery that holds promise for future drug development, scientists have detected for the first time how nature performs an impressive trick to produce key chemicals similar to those in drugs that fight malaria, bacterial ...

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