Cuticle sclerotization by the American cockroach: Differential incorporation of leucine and tyrosine during post-ecdysis
1971; Elsevier BV; Volume: 17; Issue: 12 Linguagem: Inglês
10.1016/0022-1910(71)90084-9
ISSN1879-1611
AutoresFerris R. Fox, Richard R. Mills,
Tópico(s)Insect and Pesticide Research
ResumoThe incorporation of U-14C-leucine into the cuticle occurs within the first 2 hr after ecdysis whereas U-14C-tyrosine is incorporated at a steady rate for approximately 8 hr. These data suggest that most of the cuticle protein is synthesized and laid down within a short time after ecdysis. On the other hand, tyrosine and/or metabolites (such as N-acetyl-dopamine) are translocated into the cuticle for several hours. This indicates that the sclerotization process may take place over an extended period. The movement of label suggests that the fat body may be storing tyrosine and both the fat body and midgut could be synthesizing protein. The rapid turnover of radioactivity in the haemolymph and epidermis makes an analysis of their function impossible, although they certainly act as a transporting media.
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