Secondary Metabolism and Interspecific Competition Affect Accumulation of Spontaneous Mutants in the GacS-GacA Regulatory System in <italic toggle="yes">Pseudomonas protegens</ital... oleh Qing Yan, Lucas D. Lopes, Brenda T. Shaffer, Teresa A. Kidarsa, Oliver Vining, Benjamin Philmus, Chunxu Song, Virginia O. Stockwell, Jos M. Raaijmakers, Kerry L. McPhail, Fernando D. Andreote, Jeff H. Chang, Joyce E. Loper