Microelectrode mapping methods were used to determine the organization of the first somatosensory area, S-I, of tree shrews. Tree shrews were chosen for study because of their generalized body form, phylogenetic relationship to primates, and smooth, easily mapped cortex. A systematic representation of the contralateral body surface was found in an architectonically distinct zone identified as s...

The epidemiological studies suggest that aflatoxins, the toxic metabolites of the ubiquitous mold Aspergillus flavus, may play a significant role in the evolution of hepatocellular carcinoma in man in certain geographic areas of the world. To ascertain their carcinogenicity in nonhuman primates, we have administered highly purified aflatoxin B1, intermittently in the diet at 2 ppm, to 10 female...

Department of Anthropology, Yale University, P.O. Box 208277, New Haven, CT 06520, USA (EJS) Department of Ecology and Evolutionary Biology, Yale University, P.O. Box 208106, New Haven, CT 06520, USA (EJS, ATR) Division of Vertebrate Zoology, Yale Peabody Museum of Natural History, New Haven, CT 06520, USA (EJS, ATR) United States Geological Survey, Patuxent Wildlife Research Center, National M...

An autoradiographic study of the retino-cortical projections in the tree shrew In the past few years the mode of convergence of information from the two eyes in the monkey cortex has been the subject of several studies, physiologicaP 1 and anatomical12,13,16, 2°. It is clear that binocular convergence at the cellular level does not occur to any important extent in layer IVC, which is divided ve...

Glis3 is a member of the Glis subfamily of Krüppel-like zinc finger transcription factors. Recently, Glis3 has been linked to both type I and type II diabetes and shown to positively regulate insulin gene expression. In this study, we have identified a region within the N terminus of Glis3 that shares high levels of homology with the Cubitus interruptus (Ci)/Gli family of proteins. We demonstra...

Both Glis, the downstream effectors of hedgehog signaling, and Zic transcription factors are required for Myf5 expression in the epaxial somite. Here we demonstrate a novel synergistic interaction between members of both families and Pax3, a paired-domain transcription factor that is essential for both myogenesis and neural crest development. We show that Pax3 synergizes with both Gli2 and Zic1...