Proteins in this substance are detected with Pandy's test.
Reissner's 3ber is an aggregation that forms when SCO-spondin is secreted into this substance. Increased IgÂ·G levels in this substance appear as distinctive oligoÂ·clonal bands on an electroÂ·phoretic gel. Beta-2 transferrin is found exclusively in this substance. Solutions that are less dense than this substance are termed hypobaric. Proteins in this substance are detected with Pandy's test. Its 6low is restricted by the Dandy-Walker malformation, in which the fourth ventricle is partially enlarged. The ependymal cells of the choroid plexus produce this substance, whose 6low is directed by arachnoid villi. This substance is collected during a lumbar puncture. For 10 points, name this clear, colorless liquid that surrounds the brain and spinal cord.
Reissner's 3ber is an aggregation that forms when SCO-spondin is secreted into this substance.
CSF [or cerebrospinal  luid]