The two single-strand cleavages at each end of Tn10 occur in a specific order during transposition.

During Tn10 transposition, the element is excised from the donor site by double-strand cleavages at the two transposon ends. Double-strand cleavage is a central step in the nonreplicative transposition reaction of many transposons in both prokaryotes and eukaryotes. Evidence is presented to show that the Tn10 double-strand cut is made by an ordered, sequential cleavage of the two strands. The transferred strand is cut first, and then the nontransferred strand is cleaved. The single-strand nicked intermediate is seen to accumulate when Mn2+ is substituted for Mg2+ in the reaction or when certain mutant transposases are used. The fact that the transferred strand is cleaved before the non-transferred strand implies that the order of strand cleavages is not the determining factor that precludes a replicative mechanism of transposition.

Mechanisms underlying the sensitivity of songbird forebrain neurons to temporal order.

Neurons in the songbird forebrain area HVc (hyperstriatum ventrale pars caudale or high vocal center) are sensitive to the temporal structure of the bird's own song and are capable of integrating auditory information over a period of several hundred milliseconds. Extracellular studies have shown that the responses of some HVc neurons depend on the combination and temporal order of syllables from the bird's own song, but little is known about the mechanisms underlying these response properties. To investigate these mechanisms, we recorded intracellular responses to a set of auditory stimuli designed to assess the degree of dependence of the responses on temporal context. This report provides evidence that HVc neurons encode information about temporal structure by using a variety of mechanisms including syllable-specific inhibition, excitatory postsynaptic potentials with a range of different time courses, and burst-firing nonlinearity. The data suggest that the sensitivity of HVc neurons to temporal combinations of syllables results from the interactions of several cells and does not arise in a single step from afferent inputs alone.

Boston & Maine Railroad, 1849 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Map of the Boston & Maine Railroad : published by order of the Legislature of Massachusetts, showing its relative position & connection with other railroads, prepared by order of the Committee of Investigation ; Wm. P. Parrott, engineer ; George B. Parrott, del. It was published in July 1849 by W.C. Sharp's Lith. Scale [ca. 1:162,925]. Covers area from Portland, Me. to Boston, Mass. and west to Concord, N.H.The image inside the map neatline is georeferenced to the surface of the earth and fit to the USA Contiguous Albers Equal Area Conic projection (Meters). All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, or other information associated with the principal map. This map shows features such as roads, railroads, drainage, state, county and selected town boundaries, and more.This layer is part of a selection of digitally scanned and georeferenced historic maps of New England from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of regions, originators, ground condition dates, scales, and purposes.

Annual report of the Railroad Commissioners of the State of Connecticut, for .

"Together with the annual report of the railroad companies in this state for ... ; to which are added leading statistics prepared by the Commissioners" (varies)

Annual report of the Railroad and Warehouse Commissioners of Minnesota, to the Governor, for the year ending ...

Printer varies: 1885/86, by the Pioneer Press Co.

Before the Interstate Commerce Commission : no. 879 : City of Spokane, Wash., et al., v. Northern Pacific Railway Company et al., decided February 9, 1909.

"Report and order of the Commission."

Annual report of the State Engineer & Surveyor of the state of New York and of the tabulations and deductions from the reports of the railroad corporations for the year ending.

Title varies slightly.

Annual report of the Railroad Commissioner.

Title varies slightly.

Annual report of the Railroad Commissioners of the State of Maine.

"With statistical tables compiled from the annual returns of the railroad companies operating railroads in the state, for the year ending ..., to which are added the decisions of the Board made during the year ..." (varies slightly).

Annual report of the Railroad Commissioners of the State of South Dakota for the year ending ...

Title varies slightly.

Annual report of the Railroad Commissioners, for the State of Missouri, being for the year ending ...

Description based on: 7th (1881).

The Constitution, statutes and rules of order ...

Mode of access: Internet.

Preamble, constitution and rules of order, California State Federation of Labor ... annual convention.

Title varies slightly.

Transcript of proceedings, official papers, and award of the Board of arbitration : appointed under the provisions of the Railway labor act.

Frank M. Williams, official reporter.

Kansas railroad laws as amended. With acts supplementary thereto, and rules of practice.

Mode of access: Internet.