Richardson, Brian, Richard Smith, Daniel Ungar, Ayumi Nakamura, Philip Jeffrey, Vladimir Lupashin, and Frederick Hughson. (2009) 2009. “Structural Basis for a Human Glycosylation Disorder Caused by Mutation of the COG4 Gene.”. Proc Natl Acad Sci U S A 106 (32): 13329-34. doi:10.1073/pnas.0901966106.

Ha, Jun Yong, Irina Pokrovskaya, Leslie Climer, Gregory Shimamura, Tetyana Kudlyk, Philip Jeffrey, Vladimir Lupashin, and Frederick Hughson. (2014) 2014. “Cog5-Cog7 Crystal Structure Reveals Interactions Essential for the Function of a Multisubunit Tethering Complex.”. Proc Natl Acad Sci U S A 111 (44): 15762-7. doi:10.1073/pnas.1414829111.