Concept

Lacune de Romer

Publications associées (10)

Towards implementing new isotopes for environmental research:Redetermination of the 32Si half-life

The predicted climate changes on Earth will significantly impact the environment and human society. The climate patterns observed during the past centuries led to a better understanding of the driving forces for such changes. However, more studies using ne ...

EPFL2022

Reverse-engineering the locomotion of a stem amniote

Auke Ijspeert, Kamilo Andres Melo Becerra, Tomislav Horvat, Konstantinos Karakasiliotis

Reconstructing the locomotion of extinct vertebrates offers insights into their palaeobiology and helps to conceptualize major transitions in vertebrate evolution. However, estimating the locomotor behaviour of a fossil species remains a challenge because ...

2019

Control of Bio-Inspired Sprawling Posture Quadruped Robots with an Actuated Spine

Tomislav Horvat

Sprawling posture robots are characterized by upper limb segments protruding horizontally from the body, resulting in lower body height and wider support on the ground. Combined with an actuated segmented spine and tail, such morphology resembles that of s ...

EPFL2018

KRAB zinc-finger proteins contribute to the evolution of gene regulatory networks

Didier Trono, Michaël Imbeault, Pierre-Yves Joseph Laurent Helleboid

The human genome encodes some 350 Kruppel-associated box (KRAB) domain-containing zinc-finger proteins (KZFPs), the products of a rapidly evolving gene family that has been traced back to early tetrapods(1,2). The function of most KZFPs is unknown, but a f ...

Nature Publishing Group2017

Conservation and Divergence of Regulatory Strategies at Hox Loci and the Origin of Tetrapod Digits

Denis Duboule, Marion Leleu, Daniël Noordermeer

The evolution of tetrapod limbs from fish fins enabled the conquest of land by vertebrates and thus represents a key step in evolution. Despite the use of comparative gene expression analyses, critical aspects of this transformation remain controversial, i ...

Public Library Science2014

From lamprey to salamander: an exploratory modeling study on the architecture of the spinal locomotor networks in the salamander

Auke Ijspeert, Andrej Bicanski

The evolutionary transition from water to land required new locomotor modes and corresponding adjustments of the spinal "central pattern generators" for locomotion. Salamanders resemble the first terrestrial tetrapods and represent a key animal for the stu ...

Springer Berlin Heidelberg2013

A function for all posterior Hoxd genes during digit development?

Denis Duboule, Saskia Joëlle Delpretti Anex, Jozsef Zakany

Background: Four posterior Hoxd genes, from Hoxd13 to Hoxd10, are collectively regulated during the development of tetrapod digits. Besides the well-documented role of Hoxd13, the function of the neighboring genes has been difficult to evaluate due to the ...

2012

A regulatory archipelago controls hox genes transcription in digits

Denis Duboule

The evolution of digits was an essential step in the success of tetrapods. Among the key players, Hoxd genes are coordinately regulated in developing digits, where they help organize growth and patterns. We identified the distal regulatory sites associated ...

2011

Temperature effects on the spectral properties of colloidal CdSe nanodots, nanorods, and tetrapods

Majed Chergui, Frank van Mourik, Awos Al Salman

The temp. dependence of the absorption and fluorescence spectra of colloidal CdSe nanocrystals was compared for three different shapes (dots, rods, and tetrapods) at 4-300 K. While the shift of the fluorescence max. indicates little dependence on the shape ...

2007

Regulation of number and size of digits by posterior Hox genes: a dose-dependent mechanism with potential evolutionary implications

Denis Duboule, Xavier Warot, Jozsef Zakany

The proper development of digits, in tetrapods, requires the activity of several genes of the HoxA and HoxD homeobox gene complexes. By using a variety of loss-of-function alleles involving the five Hox genes that have been described to affect digit patter ...

1997

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