Abstract
1. 1. An antibody raised against the mammal arginine-vasopressin (AVP) is used to immunopurify a neurohormone, structurally related to AVP, which enhances the excertion of the primary urine from the locust Malpighian tubules. 2. 2. The best procedure of immunopurification is developed by testing with different solvents. 3. 3. This procedure is applied to purify a semi-crude extract from 1000 suboesophageal and thoracic ganglia, the main source of hormone. 4. 4. The interest of this technique in the purification of biological materials, when only minute amounts are available, is discussed.
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