| Westermark's s. |
transient clearing (avascularity) of the normal radiologic shadow of pulmonary tissue distal to a pulmonary embolism.
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| Westermark's sign |
see under sign.
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| Western blot a. |
see under technique.
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| Western blot h. |
see under technique.
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| Western blot t. |
a technique for analyzing and identifying protein antigens: the proteins are separated by electrophoresis in polyacrylamide gel, then transferred (“blotted”) onto a nitrocellulose membrane or treated paper, where they bind in the same pattern as they formed in the gel. The antigen is overlaid first with antibody, then with anti-immunoglobulin or protein A labeled with a radioisotope, fluorescent dye, or enzyme.
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