Quantcast

Latest Organelle Stories

2011-10-05 19:05:58

Scientists call it LUCA, the Last Universal Common Ancestor, but they don't know much about this great-grandparent of all living things. Many believe LUCA was little more than a crude assemblage of molecular parts, a chemical soup out of which evolution gradually constructed more complex forms. Some scientists still debate whether it was even a cell. New evidence suggests that LUCA was a sophisticated organism after all, with a complex structure recognizable as a cell, researchers report....

2010-09-07 13:04:58

Like some people, cells eat when they are under pressure"”but they consume parts of themselves. A multi-function protein helps control this form of cannibalism, according to a study in the September 6 issue of the Journal of Cell Biology (www.jcb.org). Cells often respond to hunger or stress by digesting some of their contents. The process, known as autophagy, helps free nutrients and clean up cytoplasmic trash such as worn-out organelles and misshapen proteins. A team led by...

2010-01-21 13:53:53

EMBO Reports selects a study by researchers at IRB Barcelona as the highlighted article of the week because of the relevance of autophagy in health All cells are equipped with a recycling program to collect and remove unnecessary cellular components. Autophagy sequesters and digests aged organelles, damaged proteins and other components, which, if not disintegrated and recycled, threaten cell viability. Researchers at the Institute for Research in Biomedicine (IRB Barcelona) led by Antonio...

7c9e63633ce53bf156a97bb41eb63dd81
2009-07-08 13:40:00

Berkeley Lab scientists have shown how thousands of bacterial membrane proteins are able to assemble into clusters that direct cell movement to select chemicals in their environment.Self-assembling and self-organizing systems are the Holy Grails of nanotechnology, but nature has been producing such systems for millions of years. A team of scientists has taken a unique look at how thousands of bacterial membrane proteins are able to assemble into clusters that direct cell movement to select...


Word of the Day
tessitura
  • The prevailing range of a vocal or instrumental part, within which most of the tones lie.
This word is Italian in origin and comes from the Latin 'textura,' web, structure.