| 摘要 |
The present invention relates to a ruminant immortalized mammary epithelial cell line which has normal physiological responses in that it produces milk constituents which comprises alpha and beta -casein and lactose. There is provided, using the cell line of the present invention a method in vitro studying lactation. There is provided a method of in vitro screening for gene expression of DNA constructs for transgenic ruminant animals. The cell line can be further used in a method for expressing foreign genes. One cell line of the present invention has been deposited at the ATCC under the accession number CRL10274.
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