This invention relates to immunoglobulin molecules comprising light chain (V
L
) chimeric variable domains, heavy chain (V
H
) chimeric variable domains, e.g., scFv antibodies that are expressed at high levels within a host cell, preferably within particular cellular compartments such as, e.g., cytosol or apoplast. The V
L
, V
H
and scFv antibody molecules comprise framework scaffolds of particularly preferred framework regions. This invention also relates to nucleic acid molecules encoding the immunoglobulin molecules of this invention, vectors expressing the immunoglobulin molecules, hosts transformed with the nucleic acid molecules and vectors, and methods of using the immunoglobulin molecules. Also described are immunoglobulin libraries as well as host cells, including transgenic plants, expressing the V
L
, V
H
or scFv antibody molecules of this invention.
本发明涉及由轻链(V
L
)嵌合可变结构域、重链(V
H
)嵌合可变结构域的免疫球蛋白分子,例如在宿主细胞内高
水平表达的 scFv
抗体,最好是在特定的细胞区,如细胞质或细胞外质中表达。V
L
, V
H
和 scFv
抗体分子包括特别优选框架区域的框架支架。本发明还涉及编码本发明免疫球蛋白分子的
核酸分子、表达免疫球蛋白分子的载体、用
核酸分子和载体转化的宿主以及使用免疫球蛋白分子的方法。此外,还描述了免疫球蛋白文库以及宿主细胞(包括转
基因植物)表达 V
L
, V
H
或 scFv
抗体分子。