The invention discloses a ceratopteris pteridoides
gene for resisting human
immunologic deficiency disease toxoprotein congeners, and a preparation method and application thereof. The preparation method comprises the following steps: 1, extracting total
DNA by using an improved CTAB method, and preserving; 2, amplifying the intermediate segment of the ceratopteris pteridoides
gene for resisting human
immunologic deficiency disease toxoprotein congeners; 3, amplifying 5' flanking sequence of the ceratopteris pteridoides
gene for resisting human
immunologic deficiency disease toxoprotein congeners; 4, amplifying 3' flanking sequence of the ceratopteris pteridoides gene for resisting human immunologic
deficiency disease toxoprotein congeners; and 5, recycling and
cloning the PCR product: recycling the intermediate segment of the
target gene, and 5' and3' flanking sequence segments, transforming, culturing and selecting white colonies; and 6, judging the clone, measuring the sequence and splicing. The gene can be used for regulation and control on expression of potential antivirus genes in
plant research, carrying out research into
plant antivirus
gene engineering, and further establishes a ceratopteris pteridoides CVNH
protein preparation
system, thereby finally realizing large-scale industrial production.