NEW YORK (GenomeWeb News) – The social and health tolls of alcohol abuse, nicotine dependence, and drug addiction have been known for some time. But the genetic patterns that make some individuals more susceptible to abusing these substances — as well as those influencing their ability to quit — are less well understood.

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In PLOS this week: phylogenetic study of hepatitis E viruses in Swedish moose, recombination sites in the honeybee genome, and more.

Differences in DNA methylation could be used to distinguish between DNA samples obtained from identical twins, researchers say.

A retrovirus that's been integrated into the human genome appears to have a role in embryonic development, researchers report.

A report from MIT identifies areas of scientific research where declining research support is hindering needed advances.