[X-ray diffraction study of adaptive changes in the structure of dense phase juice from the duodenum]

Low-angle X-ray diffraction patterns of canine duodenal juice precipitates taken at two stages of digestion, after 20 h fasting and after food stimulation have been obtained. Both diffraction patterns are due to glycoproteins. However, the glycoproteins contained in the precipitate after food stimulation occur in the native form while in fasting animals they are partially degraded.