- Mutation of the membrane-associated M1 protease APM1 results in distinct embryonic and seedling developmental defects in Arabidopsis. Peer, W.A., Hosein, F.N., Bandyopadhyay, A., Makam, S.N., Otegui, M.S., Lee, G.J., Blakeslee, J.J., Cheng, Y., Titapiwatanakun, B., Yakubov, B., Bangari, B., Murphy, A.S. Plant. Cell (2009)