Genetic and functional analysis of R5X4 human immunodeficiency virus type 1 envelope glycoproteins derived from two individuals homozygous for the CCR5delta32 allele.
Gray L, Churchill MJ, Keane N, Sterjovski J, Ellett AM, Purcell DF, Poumbourios P, Kol C, Wang B, Saksena NK, Wesselingh SL, Price P, French M, Gabuzda D, Gorry PR