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- To diagnosis, we used a procedure known as a "sandwich ELISA" (Enzyme-Linked Immunosorbent Assay). 1.In the "ELISA sandwich," what is the "meat"? 2.Both patients A and B had positive results. Why are these two patients' outcomes so different? 3.What is one potential cause of an ELISA false negative result? What is one potential cause of an ELISA false positive result? What is another example of how an ELISA assay should be used?How reliable are Lateral flowimmunochromatographic assays when compared to molecular diagnostic tests or other serological tests? Please discuss referring to original articles example of covid 19..True or false? Codes 90476-90748 identify the vaccine product only.
- In Figure 5-5,a. Why do A− and B− cells, by themselves, not formcolonies on the plating medium?b. What genetic event do the purple colonies in themiddle plate represent?Why does the antibody titer determination use twofold dilutions ofthe antiserum rather than 10-fold dilutions?In Western Blots and ELISAS, the following molecules are used: Tween-20 SDS Goat anti-rabbit IgG (whole molecule) – HRP Rabbit anti-egg albumin Bovine IgG Rabbit anti-bovine IgG – HRP Egg albumin (globular protein – what is Molecular weight?) Milk protein (globular protein – what is Molecular weight?) TMB Beta-mercaptoethanol Methanol HCl May you explain the reasons why they are used?
- Following SDS-PAGE, what is an advantage of protein detection by immunoblotting (western blotting) over a non-specific gel-staining procedure? Under what circumstances would it be desirable to nonspecifically stain the gel, rather than immunoblotting?During the analysis of seven rII mutations in phage T4, mutants1, 2, and 6 were in cistron A, while mutants 3, 4, and 5 were incistron B. Of these, mutant 4 was a deletion overlapping mutant5. The remainder were point mutations. Nothing was knownabout mutant 7. Predict the results of complementation (+ or -)between 1 and 2; 1 and 3; 2 and 4; and 4 and 5.explain the most likely steps of what might happen inside a MDA-MB-231 cell after it is exposed to UV light.
- describe Complementation testing using F' plasmidsShown below are the complementation test results involving 4 independently isolated lethal mutants in a bacteriophage. Complementation was assayed by simultaneouly infecting bacteria with two phage strains, each with a different mutation, neither of which could alone lyse the cells. In the table below, a "+" indicates the strains complemented each other and therefore lysed open the bacteria. A "0" indicates no complementation and therefore no cell lysis occurred. Test pair Results 1___2___3___4 1,2 + 1 0 + + 0 1,3 + 2 0 + + 1,4 0 3 0 + 2,3 + 4 0 2,4 + 3,4 + Which mutants are in the same gene? . a. 2, & 3 b.1, 2, 3 & 4 c.1 & 4 d.1, 2 & 4Observing figure , indicate whether each method (a) through(f) is phenotypic, genotypic, or immunologic.