Related Clues:

• Taxing abbreviation?
• Tax grp.
• It's in all living cells
• Geneticist's abbr
• Genetic molecule
• Gene stuff
• Single-helix molecule
• April addressee
• Letters with messenger or transfer
• Gene messenger
• Org. with a complex code
•     Some strands in a cell
• Genetic chain
• Genetic matter
• Chem. thread