Structure of constitutively monomeric CXCL12 in complex with the CXCR4 N-terminus - Smith, Emmanuel W.; Nevins, Amanda M.; Qiao, Zhen; Liu, Yan; Getschman, Anthony E.; Vankayala, Sai L.; Kemp, M. Trent; Peterson, Francis C.; Li, Rongshi; Volkman, Brian F.; Chen, Yu (Biological Magnetic Resonance Bank, 2016)