colourless crystalline compound. Any of several bases that are derivatives of purine; a colorless crystalline organic base containing nitrogen; the parent compound of various biologically important substances.

bring into use or operation for first time.

likely or prone to be affected by. conditionally upon. People who take part in experiments or tests. To cause to suffer or experience something.

salt or ester of phosphoric acid. Salt of phosphoric acids.

Clearly different in nature from something else.

To hold something inside something else.

To turn something on.

The way in which the parts of a system or object are arranged or organized, or a system arranged in this way. construct or arrange according to plan.

way that constitutes or serves as path.

having acquired much knowledge through study. To get knowledge or skills by study or experience.

expressive. what is meant by word, text, etc.. To have a particular intention or value.

assembled or made from whatever is available, and so unlikely to be of highest quality. A small cut or mark on a surface. To rub your skin with your nails to stop an itch.

compound consisting of nucleoside linked to phosphate group.

plan of action or policy designed to achieve major or overall aim. Branch of military dealing with command.

very successful, authoritative, and commanding great respect. To make something clearly different from others.