29 results found
    1. Developmental Biology
    2. Evolutionary Biology

    Par protein localization during the early development of Mnemiopsis leidyi suggests different modes of epithelial organization in the metazoa

    Miguel Salinas-Saavedra, Mark Q Martindale
    Even though the ctenophore Mnemiopsis leidyi develops polarized epithelial tissues, polarization is not mediated by the conserved mechanisms polarizing bilaterian and cnidarian epithelial cells.
    1. Developmental Biology
    2. Evolutionary Biology

    Collagen IV and basement membrane at the evolutionary dawn of metazoan tissues

    Aaron L Fidler et al.
    Collagen IV is a primordial extracellular matrix component associated with the transition to animal multicellularity, and enabled the formation and evolution of epithelial tissues.
    1. Evolutionary Biology

    The last common ancestor of animals lacked the HIF pathway and respired in low-oxygen environments

    Daniel B Mills et al.
    Sponges and ctenophores lack hypoxia-inducible factors, suggesting that the metazoan last common ancestor could have lived aerobically under severe hypoxia and did not need to regulate its transcription in response to oxygen availability.
    1. Genetics and Genomics
    2. Evolutionary Biology

    Evolution: Oxygen and early animals

    Kalle T Rytkönen
    The biology of sponges provides clues about how early animals may have dealt with low levels of oxygen.
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    1. Evolutionary Biology
    2. Plant Biology

    Ascorbate Biosynthesis: A cross-kingdom history

    Alisdair R Fernie, Takayuki Tohge
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    1. Genetics and Genomics
    2. Neuroscience

    Evolution: The enigmatic xenopsins

    Detlev Arendt
    A new member of the family of light-sensitive proteins called opsins has stirred up our view of photoreceptors.
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    1. Evolutionary Biology
    2. Neuroscience

    Glutamate Receptors: Family matters

    Mark L Mayer, Timothy Jegla
    Genome sequence data from a range of animal species are raising questions about the origins of glutamate receptors.
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    1. Developmental Biology
    2. Evolutionary Biology

    Extraocular, rod-like photoreceptors in a flatworm express xenopsin photopigment

    Kate A Rawlinson et al.
    A new opsin receptor is light-sensitive and expressed in a unique type of photoreceptor in a flatworm that encloses over 400 sensory cilia within its cell membrane.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Ancient origins of arthropod moulting pathway components

    André Luiz de Oliveira et al.
    Evolutionary reconstruction of the ecdysis pathway shows that its major elements are present in the majority of metazoans, providing evidence that they originated much earlier than currently assumed.
    1. Developmental Biology
    2. Evolutionary Biology

    Germ layer-specific regulation of cell polarity and adhesion gives insight into the evolution of mesoderm

    Miguel Salinas-Saavedra et al.
    The expression of 'bilaterian-mesodermal’ genes changes the epithelial properties of the endomesoderm during the embryogenesis of the cnidarian Nematostella vectensis.

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