Actin is an ancient conserved protein that is encoded by multiple isovariants in multi-cellular organisms. There are eight functional actin genes in the Arabidopsis genome.
RPT5a (Regulatory Particle 5a), one of the six AAA-ATPases of the proteasome regulatory particle. It’s essential for gametophyte development. In Arabidopsis, the RPT5 subunit is encoded by two highly homologous genes, RPT5a and RPT5b. RPT5a and RPT5b show accession-dependent functional redundancy.
Mitochondrial F0F1-ATP synthase is also called Complex V and it synthesis ATP from ADP and Pi using the proton motive force created by respiratory electron transport. ATP4 (ATMG00640) is a subunit of mitochondrial F0F1-ATP synthase in Arabidopsis.