Leghemoglobin is a carrier protein produced by legume plants (such as soybeans, peanuts, or beans) during their symbiotic relationship with nitrogen-fixing soil rhizobia. It binds to its substrate oxygen with very high affinity at its active site, which is critical for its biological function.

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In the roots of legumes, ammonia produced by *Rhizobium* enables the plants to synthesize the building blocks of nucleic acids, which in turn supports herbivores and enriches the soil with nitrogen compounds upon plant decomposition.

Rhizobium-Legume Symbiosis

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

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