Abstract
Vitellogenin (VG) and the diglyceride carrying lipoprotein (DGCL) are the predominant lipoproteins in the haemolymph of adult female locusts. Antibodies against these two proteins have been prepared which do not reveal any cross reactivity. The titer of these haemolymph proteins was followed during two ovipository cycles by quantitative rocket electrophoresis. The titer of DGCL reaches a constant level of 12 mg/ml three days after adult emergence, while the vitellogenin titer undergoes characteristic changes correlated with the growth of the terminal oocytes. Until day 8 vitellogenin is virtually absent in the blood, it then quickly rises to a maximum of 20 mg/ml at day 11, corresponding to an oocyte length of 3.5 mm. Within a further 6 hr the vitellogenin concentration drops to 4 mg/ml. With the onset of the next ovipository cycle these changes in VG concentration occur again.
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