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Virginia striatula is a viviparous snake with a complex pattern of embryonic nutrition. Nutrients for embryonic development are provided by large, yolked eggs, supplemented by placental transfer. Placentation in this species is surprisingly elaborate for a predominantly lecithotrophic squamate reptile. The embryonic-maternal interface consists of three(More)
We constructed a library in lambda L47.1 with DNA isolated from flow-sorted human chromosome 22. Over 50% of the recombinants contained the same highly repetitive sequence. When this sequence was used to probe Southern blots of EcoRI-digested genomic DNA, a ladder of bands with increments of about 170 bp was observed. This sequence comigrates with satellite(More)
  • K Brasch
  • 1982
Hepatocyte nuclei from young (3--5 week), mature (8--12 week), and aged (over 32 weeks) rats were isolated and characterized by flow cytometry. Nuclei were bulk separated into diploid (2C), tetraploid (4C), and octoploid (8C) enriched fractions on sucrose gradients. Total, 0.35 M NaCl soluble, and residual proteins were prepared from all nuclear stages and(More)
Multiple endocrine neoplasis type 2A (MEN2A) is one of several kinds of cancers that appear to be inherited in an autosomally dominant fashion. We have assigned the MEN2A locus to chromosome 10 by linkage with a new DNA marker (D10S5). The linkage led us to investigate other chromosome 10 markers and demonstrate linkage between the disease locus and the(More)
Most individuals with cat eye syndrome (CES) have a supernumerary bisatellited chromosome which, on the basis of cytogenetic evidence, has been reported to originate from either chromosome 13 or 22. To resolve this question, a single-copy DNA probe, D22S9, was isolated and localized to 22q11 by in situ hybridization to metaphase chromosomes. The number of(More)
SUMMARY Regenerating blood of geese suffering from phenylhydrazine anaemia was separated into ' mature' and ' immature' cell populations by centrifugation through a barrier of BSA. Socalled 'mature cells' consisted of mainly mature erythrocytes and 'immature cells' included two-thirds polychromatic and younger erythroblasts. Histone proteins, dissociated(More)
Alterations in the structure and molecular composition of avian hepatocyte nuclei were compared following administration in vivo of lethal and sub-lethal doses of alpha-amanitin. This toxin interferes with extranucleolar transcription by direct inhibition of RNA polymerase II activity. the resultant effects include: extensive condensation of chromatin,(More)