Leitão, E., Oxelfelt, F., Oliveira, P., Moradas-Ferreira, P., & Tamagnini, P. (2005). Analysis of the hupSL operon of the nonheterocystous cyanobacterium Lyngbya majuscula CCAP 1446/4: Regulation of transcription and expression under a light-dark regimen. Applied and Environmental Microbiology, 71(8), 4567 - 4576.