A complex between d(GGGAAAAACGG).d(CCGTTTTTCCC) and the minor groove binding drug SN-6999 has been studied by 1H nuclear magnetic resonance spectroscopy. The drug is found to bind in the d(A)5 tract, but with interactions extending one residue in the 3'-direction along each strand. Doubling of resonances in the complex indicates slow to intermediate exchange between two binding modes. An orient...

We prove that every graph of rank-width k is a pivot-minor of a graph of tree-width at most 2k. We also prove that graphs of rank-width at most 1, equivalently distance-hereditary graphs, are exactly vertex-minors of trees, and graphs of linear rank-width at most 1 are precisely vertex-minors of paths. In addition, we show that bipartite graphs of rank-width at most 1 are exactly pivot-minors o...

We prove that the excluded minors for the class of matroids of branch-width k have size at most ð6 1Þ=5: r 2002 Elsevier Science (USA). All rights reserved.

We show that the complete list of regular excluded minors for the class of signed-graphic matroids is M(G1), . . . ,M(G29), R15, R16. Here G1, . . . , G29 are the vertically 2-connected excluded minors for the class of projective-planar graphs.

background and aims. salivary gland tumors are rare and specific lesions. there are differences in the incidence and frequency of salivary tumors in both minor and major salivary glands in different countries. this study was carried out to determine the prevalence of major and minor salivary gland tumors in ahvaz in the south of iran. materials and methods. all the cases, recorded in imam khome...

summary writing is associated with lots of cognitive and metacognitive complexities that necessitates instruction (hirvela & du, 2013). contrary to majority of studies carried out on summarization instruction, the present study addressed the underlying processes or microgenetic developments of the iranian efl learners’ summary writing. to this end, 41 male and female undergraduate students ...