How can just four nitrogenous bases--adenine ... either the addition or the deletion of a base in the original DNA sequence, which in turn causes the protein-forming machinery to shift positions ...

Each ribonucleotide base consists of a ribose sugar, a phosphate group, and a nitrogenous base ... and other RNA molecules make up the critical protein synthesis machinery in ribosomes.

A n oxygen sensor protein protects the enzymatic machinery of biological nitrogen fixation from serious damage, and its use in biotechnology could help to reduce the use of synthetic fertilizer in ...