www.sciencemag.org (this information is current as of April 25, 2007 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/315/5813/848 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/315/5813/848/DC1 can be found ...

We present spectroscopic observations of object CE-315 revealing a blue continuum with strong emission lines. Most of the detected lines are identified with He I or He II in emission with a handful of faint lines of nitrogen. Notable is the complete absence of hydrogen lines. The He lines exhibit triple-peaked profiles with remarkably broad widths, of ∼2000 km s (FWZP). The observations show th...

www.sciencemag.org (this information is current as of February 15, 2007 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/315/5813/848 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/315/5813/848/DC1 can be fou...

www.sciencemag.org (this information is current as of January 28, 2007 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/315/5810/370 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/315/5810/370/DC1 can be foun...

The effect of specific immunoglobulin (Ig) on specific binding of antigen to cells has been studied in a model system consisting of nurine myeloma cells (MOPC 315), MOPC 315 serum, and DNP conjugates. MOPC 315 serum, which has IgA specific for DNP, specifically inhibited the binding of DNP conjugates to these cells. Using this model it was found that cells have a marked advantage over free spec...

www.sciencemag.org (this information is current as of February 2, 2007 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/315/5811/503 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/1134454/DC1 can be found at:...

www.sciencemag.org (this information is current as of January 17, 2007 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/315/5809/233 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/315/5809/233/DC1 can be foun...