OBJECTIVE Cerebrospinal fluid (CSF) leaks may present as rhinorrhea or otorrhea and can lead to life-threatening complications if not detected. The usefulness of the morpholinopropanesulfonic acid (MOPS)-histidine buffer in detecting β₂-transferrin, which is only found in the cerebrospinal fluid, was compared with the standard barbital buffer. METHODS We evaluated 20 aural or nasal patient sp...

Twenty-three control samples of CSF were analyzed by vertical column electrophoresis on acrylamide gel. Quantitation results using a microdensitometer are presented. The normal protein pattern shows 15 constant bands which coincide in mobility and in many cases in staining pattern with serum proteins. The haptoglobin peaks, except for the band of the 1-1 type and the leading band of the 2-1 typ...

Dihydropteridine reductase (EC 1.6.99.7) was purified from human liver obtained at autopsy by a three-step chromatographic procedure with the use of (1) a naphthoquinone affinity adsorbent, (2) DEAE-Sephadex and (3) CM-Sephadex. The enzyme was typically purified 1000-fold with a yield of 25%. It gave a single band on non-denaturing and sodium dodecyl sulphate/polyacrylamide-gel electrophoresis,...

A number of enzymes, including amylases, dehydrogenases, and proteases, were shown to be renaturable after polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulfate. Enzyme activity was detected in situ by action on substrates introduced into the gel and subsequent staining of either the product or unreacted substrate. This technique combines the advantage of enzyme identific...