1. | Protein abundance in the plasma membrane and/or organelles, including the cytoplasm. |
2. | Differential protein expression in the organ from which the cells originated. |
3. | Differential protein expression in the different sides of membrane vesicles. |
4. | Differential protein expression of cellular characteristics under various cell culture conditions such as co-culture, conditioned medium and passage number. |
5. | Alteration of cellular characteristics at various stages of differentiation. |
6. | Expression level of target protein(s) over-expressed in cells by transfection of the corresponding gene. |
7. | Expression level of an endogenous protein(s) to select a host cell line for the transfection of an exogenous gene and to validate the up-regulation and/or down-regulation of functionally related proteins in the cells after transfection of an exogenous gene. |
8. | Expression level of target proteins generated by an artificially transfected exogenous chromosome, such as one from a different species of animal, in the cells. |
9. | Cellular characterization of xenograft tissues before and after their transplantation into in vivo animals. |