The invention provides novel Delta3, FTHMA-070, Tango85, Tango77, SPOIL, NEOKINE, Tango129 and A259 polypeptides, proteins, and nucleic acid molecules. In addition to isolated, full-length Delta3, FTHMA-070, Tango85, Tango77, SPOIL, NEOKINE, Tango129 and A259 proteins, the invention further provides isolated Delta3, FTHMA-070, Tango85, Tango77, SPOIL, NEOKINE, Tango129 and A259 fusion proteins, antigenic peptides and anti-Delta3, FTHMA-070, Tango85, Tango77, SPOIL, NEOKINE, Tango129 and A259 antibodies. The invention also provides Delta3, FTHMA-070, Tango85, Tango77, SPOIL, NEOKINE, Tango129 and A259 nucleic acid molecules, recombinant expression vectors containing a nucleic acid molecule of the invention, host cells into which the expression vectors have been introduced and non-human transgenic animals in which a Delta3, FTHMA-070, Tango85, Tango77, SPOIL, NEOKINE, Tango129 or A259 gene has been introduced or disrupted. Diagnostic, screening and therapeutic methods utilizing compositions of the invention are also provided.