The poly-A tail is a long chain of adenine nucleotides that is added to a messenger RNA (mRNA) molecule during RNA processing to increase the stability of the molecule. Immediately after a gene in ...

Ring-tailed lemurs are unmistakable because of their long, vividly striped, black-and-white tail. They are familiar residents of many zoos. Lemurs use their hands and feet to move nimbly through ...