Jason Caronna

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Maize Helitron transposons are intriguing because of their notable ability to capture gene fragments and move them around the genome. To document more extensively their variability and their contribution to the remarkable genome structure variation of present-day maize, we have analyzed their composition, copy number, timing of insertion, and chromosomal(More)
Helitrons represent a new class of transposable elements recently uncovered in plants and animals. One remarkable feature of Helitrons is their ability to capture gene sequences, which makes them of considerable potential evolutionary importance. However, because Helitrons lack the typical structural features of other DNA transposable elements, identifying(More)
Blood flow has been measured locally in the hypothalamus of anaesthetized rabbits by measuring the clearance of small volumes (5-20 mul.) of a mock cerebrospinal fluid solution containing 133Xe. The effect of varying the [K+] or [HCO-3] of the 133Xe-containing solution on local hypothalamic blood flow has been investigated. 2. There was an increase in local(More)
A twenty-five year old woman suffered the acute onset of dysequilibrium followed by headache, nausea, vomiting, vertigo, and slurred speech while swimming. Brain imaging revealed a right cerebellar infarct. Intravenous digital subtraction angiography showed a hypoplastic right vertebral artery and focal narrowing of the dominant left vertebral at the level(More)
The nonautonomous maize Ds transposons can only move in the presence of the autonomous element Ac. They comprise a heterogeneous group that share 11-bp terminal inverted repeats (TIRs) and some subterminal repeats, but vary greatly in size and composition. Three classes of Ds elements can cause mutations: Ds-del, internal deletions of the 4.6-kb Ac element;(More)
Eight of 90 patients with ischemic neurologic events were found to have persistent, isolated high-level IgM anticardiolipin antibodies. Strokes were multiple in four patients. Six patients were under 50 years of age at the time of the first stroke.