Evolution: Enhanced Footing for Snake Limb Development
نویسندگان
چکیده
منابع مشابه
Evolution: Enhanced Footing for Snake Limb Development
Two groups have studied the loss of limbs in snake evolution by focusing on a long-distance cis-acting enhancer of Sonic Hedgehog. They find a progressive degeneration of binding sites for key transcription factors, mirroring the progressive limblessness occurring in these reptiles.
متن کاملProgressive Loss of Function in a Limb Enhancer during Snake Evolution
The evolution of body shape is thought to be tightly coupled to changes in regulatory sequences, but specific molecular events associated with major morphological transitions in vertebrates have remained elusive. We identified snake-specific sequence changes within an otherwise highly conserved long-range limb enhancer of Sonic hedgehog (Shh). Transgenic mouse reporter assays revealed that the ...
متن کاملVIEWPOINT A Solid Footing for a Quantum
Q uantum secure communication relies on sharing of entangled states between parties. Over short distances (less than 100 km), these states can be distributed by sending photons over optical fibers, but losses in those fibers limit long-distance sharing. One solution is to use a sequence of “quantum repeaters” along the optical fiber connection [1]. These devices can store the quantum informatio...
متن کاملDirectional Footing, Degeneracy, and Alignment
This paper argues from an Optimality Theory (OT; Prince & Smolensky 1991, 1993; McCarthy & Prince 1993a,b, 1994) perspective that no one-to-one correspondence exists between directional footing effects and individual constraints. Rather, the requirements of a single prosodic alignment constraint may result either in left-to-right or right-to-left footing, depending on its position in a constrai...
متن کاملFooting the bill.
When the discussion turns to the creation of a European Research Council (ERC), a series of questions spring to mind. Answering some of them is now almost trivial—for example, “Why is an ERC needed and timely?”— whereas the answers to others, being more political, are certainly more difficult to envisage for most practising scientists. This is notably the case for the questions: “Who will be th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Current Biology
سال: 2016
ISSN: 0960-9822
DOI: 10.1016/j.cub.2016.10.018