Structural comparison of somatically related PG9 and PG16 in complex with their epitope reveals differences in glycan recognition. - Pancera, M.; McLellan, J. S.; Shahzad-ul-Hussan, S.; Doria-Rose, N.; Zhang, B.; Yang, Y.; Burton, D. R.; Koff, W. C.; Bewley, C. A.; Kwong, P. D. (Retrovirology, 2012)