Plasmid vectors allow the delivery and insertion of target genes into host cells, thereby driving the expression of gene-encoded functional products. As indispensable tools in molecular biology, plasmid vectors underpin the progress of multiple research frontiers, including synthetic biology, biomedicine, gene therapy, targeted drug screening and agricultural biotechnology.
01
Design Vector
The rational design of plasmid constructs necessitates systematic optimization of core functional elements, including the origin of replication, selection marker, promoter, and multiple cloning site (MCS), to adapt to the designated host organism and experimental objectives.
02
Cloning Vectors
Cloning vectors mainly consist of an origin of replication, a multiple cloning site (MCS) and an antibiotic resistance gene. The target DNA fragment is inserted into the vector for cloning.
03
Expression Vectors
Expression VectorsBeyond the inherent elements of cloning vectors, expression vectors harbor additional cis-acting regulatory elements essential for transcription and translation.
04
Scaling up
Scaling up plasmid DNA (pDNA) production necessitates a transition from laboratory-scale shake-flask cultivation to large-scale fed-batch fermentation (typically ranging from 50 L to over 100 L), so as to meet the growing demands of therapeutic development, vaccine manufacturing and viral vector preparation.
