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Example sentences for: cos-
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However, the Src inhibitor, PP1 or the expression of a dominant-negative Src mutant, will reduce GPCR-mediated transphosphorylation of the EGFR and GPCR-mediated ERK activation to varying degrees (partial to total), suggesting that at least two different tyrosine kinases can be involved [ 18 ] . Src was found to co-immunoprecipitate with the phosphorylated EGFR in COS-7 cells exposed to either LPA or EGF [ 14 ] . These authors reported that the autophosphorylation of Y350 in the EGFR does not occur after LPA exposure, suggesting that c-Src is the principal tyrosine kinase in this instance and not the EGFR's intrinsic tyrosine kinase.
Cos-7 and NIH3T3 cells were grown in DMEM containing 10% FCS and antibiotics at 37°C with 5% CO 2 . Cos-7 cells were transfected by calcium phosphate method, while the NIH3T3 cells were transfected using Lipofectin (Gibco, BRL).
Inhibition of PGE 2 binding to the rabbit EP 2 receptor by AH13205 is about 100 times greater than that to rabbit EP 4 in transfected COS-1 cells (unpublished data).
Soluble and particulate fractions were isolated as previously described [ 29 ] . BHK or COS-7 cells were transfected in 6 cm plates with 3 μg of the indicated expression plasmid.
Transient expression of the Src*/Cas(SD) in Cos-7 cells followed by analysis of total cell lysates using anti-phosphotyrosine antibodies demonstrated that while the attenuated Src kinase domain alone did not increase total cellular tyrosine phosphorylated proteins as expected, expression of the Src*/Cas(SD) fusion resulted in tyrosine phosphorylation of a protein of the expected size of the chimera, as well as other proteins (Fig.
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