Abstract: Nucleic acid molecules encoding full length PTP20, PCP-2, BDP1, mCLK2, mCLK3, mCLK4, and SIRP polypeptides, portions of such nucleic acid molecules, nucleic acid vectors containing such nucleic acid molecules, recombinant cells containing such nucleic acid vectors, polypeptides purified from such recombinant cells, antibodies to such polypeptides, and methods of identifying compounds that bind such polypeptides or abrogate their interactions with natural binding partners. Methods for diagnosing abnormal conditions in an organism with PTP20, PCP-2, BDP1, mCLK2, mCLK3, mCLK4, and SIRP related molecules or compounds. PTP20, PCP-2, BDP1, mCLK2, mCLK3, mCLK4, or SIRP polypeptides, nucleic acids encoding such polypeptides, cells, tissues and animals containing such nucleic acids, antibodies to such polypeptides, assays utilizing such polypeptides, and methods relating to all of the foregoing.

Abstract: Nucleic acid molecules encoding full length PTP20, PCP-2, BDP1, mCLK2, mCLK3, mCLK4, and SIRP polypeptides, portions of such nucleic acid molecules, nucleic acid vectors containing such nucleic acid molecules, recombinant cells containing such nucleic acid vectors, polypeptides purified from such recombinant cells, antibodies to such polypeptides, and methods of identifying compounds that bind such polypeptides or abrogate their interactions with natural binding partners. Methods for diagnosing abnormal conditions in an organism with PTP20, PCP-2, BDP1, mCLK2, mCLK3, mCLK4, and SIRP related molecules or compounds. PTP20, PCP-2, BDP1, mCLK2, mCLK3, mCLK4, or SIRP polypeptides, nucleic acids encoding such polypeptides, cells, tissues and animals containing such nucleic acids, antibodies to such polypeptides, assays utilizing such polypeptides, and methods relating to all of the foregoing.

Abstract: Nucleic acid molecules encoding full length PTP20, PCP-2, BDP1, mCLK2, mCLK3, mCLK4, and SIRP polypeptides, portions of such nucleic acid molecules, nucleic acid vectors containing such nucleic acid molecules, recombinant cells containing such nucleic acid vectors, polypeptides purified from such recombinant cells, antibodies to such polypeptides, and methods of identifying compounds that bind such polypeptides or abrogate their interactions with natural binding partners. Methods for diagnosing abnormal conditions in an organism with PTP20, PCP-2, BDP1, mCLK2, mCLK3, mCLK4, and SIRP related molecules or compounds. PTP20, PCP-2, BDP1, mCLK2, mCLK3, mCLK4, or SIRP polypeptides, nucleic acids encoding such polypeptides, cells, tissues and animals containing such nucleic acids, antibodies to such polypeptides, assays utilizing such polypeptides, and methods relating to all of the foregoing.

Abstract: A high-density recording optical head for increasing recording density in an optical head for recording and reproducing information optically. The disclosed optical head is provided with an iris for transmitting or passing the central portion of the reflected light when the light reflected from a medium is transmitted by an ordinary objective lens. Another iris is also provided for transmitting or reflecting the periphery of the reflected light and, in this case, an improved objective lens structure including two inner and outer elements is provided. Therefore, in the disclosed optical head, only light reflected from the actual recording region is detected as a reproduction signal. According to the disclosed optical head, high-density recording in identical media becomes possible.