This third filament involved in muscle function is often ignored in medical textbooks. Here's how it works.

Scientists develop a micropatterning device to study cell behavior. 

Molecules extracted from 3.8 million-year-old ostrich eggshells appear to break the record for oldest preserved proteins.

A new database includes complete sequences of protein-coding DNA from 60,706 individuals.

Researchers are finding new drugs for chronic pain and autoimmune diseases by modifying animal venom-derived molecules that target the nervous and immune systems.

Researchers report steady progress in the effort to map all the proteins made by human chromosomes.

Two-tone fluorescent tags track the movement and life span of proteins within living cells.

Robert J. Lefkowitz and Brian K. Kobilka take this year’s Nobel Prize for Chemistry for revealing the receptors through which cells sense their environment.