A steady fall of cometary ice, some scientists say, also helped to inundate the world and perhaps sowed organic molecules associated with life.

It also increases the survival of neurones that respond to a neurotransmitter called dopamine, and is a potential therapeutic molecule associated with Parkinson's disease.

Animal tissues and fluids can contain other disease-causing contaminants, like prions, a poorly understood class of molecules associated with maladies including mad cow disease.

COP appears to be a unique molecule associated with the plasma membrane and to have a fixed pore geometry and conductance for each vital dye examined.

Pattern recognition receptors are proteins used by nearly all organisms to identify molecules associated with pathogens.

Individual plant cells respond to molecules associated with pathogens known as Pathogen-associated molecular patterns or PAMPs.

Riders walked one by one through a device that sniffs the air for molecules associated with explosives.

This gene encodes the subunit of a collagen-like molecule associated with acetylcholinesterase in skeletal muscle.

Disease association studies typically treat each HLA allele as a single complete unit, which does not illuminate the parts of the molecule associated with disease.

And such planets could be warm enough to have water in liquid form, which is considered a requirement for chemical processes creating organic molecules associated with life.