
After obtaining the positive nanobody sequence, the sequence is constructed into an expression vector for expression and purification. Due to the relatively simple structure of nanobodies, they can be correctly expressed and folded in prokaryotic cells. The expression and purification are performed using Escherichia coli BL21.

Constructing a High-Diversity Nanobody DNA Library involves a two-phase blood collection process. The first round of blood collection occurs after the completion of the third antigen immunization, and the second round follows the fourth antigen immunization, with a total blood volume exceeding 200mL. Lymphocytes are isolated, and RNA...
Constructing a High-Diversity Nanobody DNA Library involves a two-phase blood collection process. The first round of blood collection occurs after the completion of the third antigen immunization, and the second round follows the fourth antigen immunization, with a total blood volume exceeding 200mL. Lymphocytes are isolated, and RNA extraction, along with the construction of the library, is performed.