The most cited biology articles of 2009

These are the 5 papers in biology, published in the last two years, which received the most citations during 2009, according to Thomson Reuters (thanks to TheScientist.com for the info!)

5. A M. Wernig, et al., "In vitro reprogramming of fibroblasts into a pluripotent ES-cell-like state," Nature 448: 318-24, 2007.

4. E. Birney, et al., "Identification and analysis of functional elements in 1% of the human genome by the ENCODE pilot project, "Nature, 447: 799-816, 2007.

3. A. Barski, et al., "High-resolution profiling of histone methylations in the human genome," Cell, 129: 823-37, 2007.

2. K.A. Frazer, et al., "A second generation human haplotype map of over 3.1 million SNPs," Nature, 449: 854-61, 2007.

1. K. Takahashi, et al., "Induction of pluripotent stem cells from adult human fibroblasts by defined factors," Cell, 131: 861-72, 2007.

Three Nature articles and two Cell ones... well, I guess there's no surprise there.

Here's a cartoon from Jorge Cham's Piled Higher and Deeper series.