Biologists have found new evidence of why mice, people and other vertebrate animals carry thousands of varieties of genes to make immune-system proteins named MHCs--even though some of those genes make vertebrate animals susceptible to infections and to autoimmune diseases.
Fig.Friend mouse leukemia virus (yellow) budding from infected T-lymphocyte (blue).
To know more about this interesting article please see the link below
http://www.nsf.gov/news/news_summ.jsp?cntn_id=123040&WT.mc_id=USNSF_51&WT.mc_ev=click
Thanks & regards,
Mahantesha

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