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. 2008 May 1;36(10):e57. doi: 10.1093/nar/gkn200

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© 2008 The Author(s)

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — Chloroacetaldehyde reacts with unpaired cytosine and adenine nucleobases in DNA producing 3,N4-ethenocytosine (εC) and 1,N6-ethenoadenine (εA), respectively.