Fig. 3From: A nanobody‐horseradish peroxidase fusion protein‐based competitive ELISA for rapid detection of antibodies against porcine circovirus type 2Expression of PCV2‑Nb15‑HRP fusion protein. a Obtain PCV2-Nb15 VHH gene by digesting recombinant vector pCANTAB 5E-PCV2-Nb15 with Not I and Pst I. b Detect the reaction of PCV2‑Nb15‑HRP fusion protein with PCV2-Cap protein using indirect ELISABack to article page