Immunology

See attached file for full problem description. Table 1: Affinities of tg ARS antibodies It is possible to make transgenic (tg) mice whose B cells ___________________________________ express a tg heavy chain gene. An investigator recently Antibody Ka did an intriguing experiment to probe the basis for ___________________________________ humoral memory: She made single and double tg mice Ars11 10^-4 for two different heavy chains, that had been derived Ars55 10^-6 from previously characterized hybridomas. One, called ___________________________________ Ars-11, is a l o w affinity antibody for the paraazophenylarsonate (ARS) hapten when paired with endogenous kap... click for more

Immunology

Professor Owen made an astute observation: In outbred cattle, dizygotic twins that share the same placenta occur occasionally. Indeed, if one examines peripheral blood samples from such twin pairs, each has blood cells derived from the other, indicating a shared circulatory systems in utero. Surprisingly, even though they are not genetically identical, they accept tissue grafts from one another. • Inasmuch as these are dizygotic twins and thus are not genetically identical, does their mutual graft acceptance violate the "isografts succeed, allografts fail" rule? • What does this experiment tell you about the underlying mechanism of that last property of the immune system - non responsi... click for more

Immunology

a): Specify the child’s problem in immunologic terms, and tell how it explains his symptoms. b). Speculate BRIEFLY on the underlying mechanism of the child’s disease, AND its likely mode of transmission. c). What would you do to treat this child? What potential problems do you foresee with your treatment? See attached file for full problem description.

Immunology experiment telling what types of molecules should be present.

An experiment that used syngeneic mice that had been immunized with ovalbumin. Experimental group: Dendritic cells were fed ovalbumin four hours prior to mixing splenic CD3+ and CD4+ mixed together (control group splenic CD3+ and CD4+ only). An hour after the cells had been mixed together they were lysed and immunoprecipitation was formed using anti-TCR Beta antibodies that had been prepared by rats. What from the following list, besides the obvious TCR beta chain, would you expect to find (possibly by IB) in the immunoprecipitate (Enzyme – substrate interaction is unlikely to persist long enough for them to remain in association after immunoprecipitation.) TCR alpha Lck MHC class ... click for more

Immune System

1) Describe how the mammalian immune system responds to (i) a laceration, such as an injury from falling on a barbed-wire fence, and (ii) a viral infection. 2) Explain how the flu vaccination works and why it has a fairly low success rate.