Like in many other signaling pathways, most components in Wnt signal transduction are highly conserved in evolution. In organisms ranging from C. elegans to mice, a similar hierarchy of signaling molecules transmits the Wnt signal to the nucleus. In current models of this pathway, the secreted Wnt protein is received by Frizzled-like cell surface receptors. In the cytoplasm, Dishevelled (Dsh) r...

Interpretation and Partition Refinement for Model CheckingD. R. DamsFaculty of Mathematics and Computing Science, TUE, 1996-13 Topological Dualities in SemanticsM. M. BonsangueFaculty of Mathematics and Computer Science, VUA, 1996-14 Algorithms for Graphs of Small TreewidthB. L. E. de FluiterFaculty of Mathematics and Computer Science, UU, 1997-01 Process-algebraic Trans...

Colonization by Campylobacter strains was investigated in human, broiler, and pig fecal samples from 1997-1998, as well as in foods of animal origin, and antibiotic susceptibility testing was carried out for these strains. Campylobacter strains were isolated in the foods of animal origin (55 of 101 samples; 54.4%), intestinal samples from broilers (85 of 105; 81%), and pigs (40 of 45; 88.9%). A...

[1] Microspheres Catalog (1998±2000), Polysciences, Warrington, PA. 1988. [2] D. A. Tomalia, Adv. Mater. 1994, 6, 529. [3] See, for example, H. Weller, Adv. Mater. 1993, 5, 88. A. P. Alivisatos, MRS Bull. 1995, 20(8), 23. [4] G. Schmid, Chem. Rev. 1992, 92, 1709. [5] N. A. M. Verhaegh, A. van Blaaderen, Langmuir 1994, 10, 1427. [6] Emulsion Polymerization (Ed: I. Piirma), Academic, New York 198...

Early embryogenesis in Xenopus proceeds from a fertilized egg to a blastula of approximately 4,000 cells in a series of 12 rapid cell divisions. Throughout this period there is no transcriptional activity (Prioleau et al., 1995; Hair et al., 1998), and the assembly of new chromatin from almost continuously replicating DNA is largely dependent on a maternal pool of histones and assembly factors....

The 1997–98 El Niño was both unusually strong and terminated unusually. Warm eastern equatorial Pacific (EEqP) sea surface temperature anomalies (SSTAs) exceeded 4°C at the event peak and lasted well into boreal spring of 1998, even though subsurface temperatures began cooling in December 1997. The oceanic processes that controlled this unusual termination are explored here and can be character...