Presence of a substance rich in protein-bound cystine or cysteine in the neurosecretory system of an insect.

摘要: COMPARISONS have been drawn between the hypothalamo-hypophysial neurosecretory system of vertebrates and corresponding systems in invertebrates; for example, pars intercerebralis-corpus cardiacum insects1. Such comparisons are supported by demonstration both groups2 a deeply staining chrome–alum–haematoxyphil material. In dog, this material has described as glycolipoprotein ‘bearer-substance’, soluble lipid-solvents, reason clearly to be differentiated from posterior pituitary principles3. There is, however, an alternative view4, namely, that vertebrate material, or its exact distribution, is essentially protein, which, tissues which not fixed formalin, water rather than lipid solvents, these reasons, because high cystine content, could well closely akin principles. The present investigation concerned with nature intercerebralis–cardiacum cockroach, Leucophaea maderae.