Last seen in:
- New York Times - Jan 3 2020
- Premier Sunday - King Feature Syndicate - Jul 22 2018
- Premier Sunday - King Feature Syndicate - Dec 18 2016
- Premier Sunday - King Feature Syndicate - Feb 1 2015
- New York Times - Sep 11 2014
- Premier Sunday - King Feature Syndicate - Sep 2 2012
- Universal - Jun 19 2011
- L.A. Times Sunday - Jan 30 2011
- Premier Sunday - King Feature Syndicate - Apr 5 2009
- L.A. Times Sunday - Aug 17 2008
Related Clues:
- Geneticist's letters
- Biochemist's concern
- 'CSI' concern
- CSI identifier
- Geneticist's concern
- Initials linked to Watson and Crick
- Protein production aid
- Highly reliable evidence
- Life's building block
- Genetic messenger letters
- Transmitter of genetic information
- "CSI" proof
- Stranded matter
- Biotech material
- Cloning need