Seventeenth Ecdysone Workshop

16th International Ecdysone Workshop: July 10–14, 2006, Ghent University, Belgium

Responses to Ecdysone Express D ifferent Ecdysone Receptor lsoforms

In D. melanogaster a pulse of the steroid hormone ecdysone triggers the larval-to-adult metamorphosis, a complex process in which this hormone induces imaginal t issues to generate adult structures and larval tissues to degenerate. We show that the EcR gene encodes three ecdysone receptor isoforms (EcR-A, EcR-81 , and EcR-B2) that have common DNAand hormone-binding domains but different N-termi...

COMARE Seventeenth Report.

The Ecdysone Receptor Puzzle

The present article reviews some recent findings on the functional ecdysone † receptor which is a heterodimer of two proteins: ecdysone receptor (EcR) and Ultraspiracle (USP). Emphasis is given to some unique aspects of this receptor, in particular to its dimerization, binding to DNA, and transactivation capabilities. The effects of ligands (ecdysone, juvenile hormone) on these functions are di...

A seventeenth-order polylogarithm ladder

Cohen, Lewin and Zagier found four ladders that entail the polylogarithms Lin(α −k 1 ) := ∑ r>0 α −kr 1 /r n at order n = 16, with indices k ≤ 360, and α1 being the smallest known Salem number, i.e. the larger real root of Lehmer’s celebrated polynomial α + α − α − α − α − α − α + α + 1, with the smallest known non-trivial Mahler measure. By adjoining the index k = 630, we generate a fifth ladd...