smen
Forum Newbie
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I have this homework assignment and I can't figure out the answer to 3 of the questions. I've read all the chapters and still am lost. Could someone please guide me or give me an idea of what the answer is?
1. Describe the various forms of the IL-2 receptor and how these forms regulate T-cell responses.
2. What distinguishes chemokines from interleukins?
3. Speculate on why two complement pathways evolved. What functions other than direct killing (or one or more of its components) does complement perform?
Thank you in advance,
May
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| jorgefhoyos
Forum Newbie
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Posts: 48
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1.- If by forms of the IL-2 receptor you mean the chains that constitute it, you can wiki it...
2.- chemokines are chemotactic cytokines, whose main function is regulating cell migration from one place to another. Interleukins have a great variety of funtions: communication between cells for growth, proliferation, division, class switching, etc...
3.- Different components of the complement system have functions other than killing (which is done by the membrane attack complex (C5-C9))...
For example, C3a, C4a and C5a are anaphylatoxins, and C3b is an opsonin.
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