A subunit is a smaller part or component that makes up a larger whole. It refers to a segment or division within a larger structure or organization. Full definition
It is not known whether coordination in the expression of subunits of essential complexes occurs at the level of transcription, mRNA abundance or protein expression. (janelia.org)
The simulations demonstrated that the critical factor is particle density — in other words, the total concentration of subunits in the system: In a system in which the particle density is low, opportunities for interaction are few, and individual filaments are widely separated. (sciencedaily.com)
This block is caused by mutations of the gene encoding the γc cytokine receptor subunit of interleukin - 2, -4, -7, -9, and -15 receptors, which participates in the delivery of growth, survival, and differentiation signals to early lymphoid progenitors. (science.sciencemag.org)