[Effect of space flight on the makeup of the soluble proteins of the spinal cord and intervertebral ganglia of rats].

The content of individual protein fractions extracted successively from the spinal cord (at the level of the lumbar enlargement and the spinal ganglia) with distilled water, 0.85% NaCl solution and 0.1 N NaOH was studied. The content of water-soluble proteins in the white and grey matter of the spinal cord decreased significantly 12 hours postflight. The content of salt-soluble and alkali-soluble proteins in the spinal cord and spinal ganglia structures per 1 mg of fresh tissue displayed no significant change. As compared with the control, 25 days postflight the water-soluble protein concentration in the grey matter of the spinal cord increased significantly. There was a rise of the water-soluble proteins in the white matter of the spinal cord reaching the preflight level. Alkali-soluble proteins content in the spinal ganglia also increased significantly.