RT Journal Article SR Electronic T1 Single-domain antibody screening by isPLA-seq JF Life Science Alliance JO Life Sci. Alliance FD Life Science Alliance LLC SP e202101115 DO 10.26508/lsa.202101115 VO 5 IS 1 A1 Yueyuan Yin A1 Fei Yan A1 Ruimin Zhou A1 Mingchen Li A1 Jinyi Ma A1 Zhe Liu A1 Zhenyi Ma YR 2022 UL https://www.life-science-alliance.org/content/5/1/e202101115.abstract AB Single-domain antibody (sdAb) holds the promising strategies for diverse research and translational applications. Here, we describe a method for the adaptation of the in situ proximity ligation assay (isPLA) followed by sequencing (isPLA-seq) to facilitate screening of a high-sensitive, high-throughput sdAb library for a given protein at subcellular and single-cell resolution. Based on the sequence of complementarity-determining region 3 (CDR3), the recombinant sdAb can be produced for in vitro and in vivo utilities. This method provides a general means to identify the functional measure of sdAb and its complementary epitopes and its potential applications to investigate cellular processes.