This is certainly a major molecular mechanism of how breast cancer metastasizes to the lymph nodes.

BBC: tumour in breast

The new approach attacks the molecular mechanism by which tumors get their oxygen supply.

FORBES: Targeting Tumors

However, Professor Grant said the molecular mechanism behind the effect was not known.

BBC: Scientists boost memory power

Schwartz believed memory maintenance could be boiled down to a simple molecular mechanism, but it was no easy matter to find the important one.

FORBES: Names You Need To Know: Todd Sacktor's Search For The Memory Enzyme

Elixir focuses on another molecular mechanism linked to aging, one that casts doubt on the fad of taking human growth hormone to keep you young.

FORBES: Researchers are unlocking the mysteries of aging.

Professor Seth Grant, an expert in the molecular mechanism of learning and memory at Edinburgh University, told BBC News Online that PKM was a particular version of an enzyme called protein kinase C (PKC) that had long been implicated in learning.

BBC: Scientists boost memory power