All of the information needed to build and maintain an organism — whether it's a human, a dog, or a bacterial cell — is contained in its DNA. DNA molecules are composed of four nucleotides ...

DNA is negatively charged ... Interestingly, histone H1 is very important in stabilizing chromatin higher-order structures, and 30-nanometer fibers form most readily when H1 is present.

The order came just over 48 hours before David Leonard Wood was set to be executed by lethal injection on Thursday.

The judge also ordered DNA profiles from each member of the Routier family also be sent to the California lab for comparison purposes. One of Darlie Routier’s attorneys, Richard R. Smith of ...