New research suggests that the sugar ribose -- the “R” in RNA -- is probably found in comets and asteroids that zip through the solar system and may be more abundant throughout the universe than was ...

Poly(ADP-ribose) polymerase 1 (PARP1) was the first member of the PARP family to be identified. The PARP family now comprises 18 members. PARP1 post-translationally modifies itself and a range of ...

In living organisms today, complex molecules like RNA and DNA are constructed with the help of enzymes. So how did these molecules form before life (and enzymes) existed? Why did some molecules end up ...

RNA is a single stranded molecule containing a ribose sugar. It has a distinctive structure and, unlike DNA, there are variations and various types of RNA structures. A base is attached to the 1' ...