STS-89 Will Carry Five Science Payloads From NAS...( low the first protein crystalstudies b...)

STS-89 Will Carry Five Science Payloads From NASA/Marshall

low the first protein crystal studies by even finer neutron diffraction.

Returning on STS-89 will be the Interferometer Protein Crystal Growth Apparatus (IPCG), a device placed aboard Mir by the STS-86 mission. IPCG uses a compact optical system to show how the concentrations vary inside a solution as a protein crystal grows in the microgravity environment of space. The system was operated by astronaut David Wolf and provides video images captured on computer. An improved understanding of how large protein molecules move through a liquid will help scientists in tailoring techniques for growing large, near-perfect crystals in space for analysis on the ground.

IPCG was set up and operated inside the Middeck Glovebox facility that was installed aboard Mir in April 1996. The STS-89 mission will return the glovebox to Earth for detailed examination to help determine the long-term effects of space operations on experiment hardware. The glovebox supported a range of microgravity science experiments in addition to IPCG.

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Contact: Dr. John Horack
john.horack@msfc.nasa.gov
(205) 544-1872
NASA/Marshall Space Flight Center--Space Sciences Laboratory
16-Jan-1998

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