@article{article155d2cbe,
title   = {Distribution of nitrogen fixation and nitrogenase-like sequences amongst microbial genomes},
author = {Santos, Patrícia Carla dos and Fang, Zhong and Mason, Steven W and Setubal, João Carlos and Dixon, Ray},
year = {2012},
doi = {10.1186/1471-2164-13-162},
journal   = {BMC Genomics}
}