Screening ssDNA aptamers against HIV P24 antigen using agarose beads as carriers Jiayu Zeng, Xing Li, Hongxia Yuan, Meilan Ma, Dongdong Li, Jing Ma and Shiqi Liao BIO Web Conf., 8 (2017) 03009 Published online: 11 January 2017 DOI: 10.1051/bioconf/20170803009