During mammalian hindbrain development, sensory axons grow along highly stereotyped routes within the cranial mesenchyme to reach their appropriate entry points into the neuroepithelium. Thus, trigeminal ganglion axons always project to rhombomere (r)2, whilst facial/acoustic ganglia axons always project to r4. Axons are never observed to enter the mesenchyme adjacent to r3, raising the possibi...

MYB transcription factors regulate multiple aspects of plant growth and development. Among the large family of MYB transcription factors, single-repeat R3 MYBs are characterized by their short sequence (<120 amino acids) consisting largely of the single MYB DNA-binding repeat. In the model plant Arabidopsis, R3 MYBs mediate lateral inhibition during epidermal patterning and are best characteriz...

The DNA-binding region of Myb consists of three imperfect tandem repeats (R1, R2, and R3). We have determined the solution structure of a specific DNA complex of the minimum DNA-binding domain (R2R3) by heteronuclear multidimensional NMR. Both R2 and R3 contain three helices, and the third helix in each is found to be a recognition helix. R2 and R3 are closely packed in the major groove, so tha...

We consider in this paper a hyperbolic quasilinear version of the Navier-Stokes equations three space dimensions, obtained by using Cattaneo type law instead Fourier law. In our earlier work [2], we proved global existence and uniqueness solutions for initial data small enough H4(R3)3 ? H3(R3)3. paper, refine previous result establish under significantly lower regularity. first prove local solu...

OBJECTIVE To investigate the in vitro antioxidant activity of different fractions (R1, R2 and R3) obtained from pet ether extract of black pepper fruits (Piper nigrum Linn.) MATERIALS AND METHODS The fractions R1, R2 and R3 were eluted from pet ether and ethyl acetate in the ratio of 6:4, 5:5 and 4:6, respectively. 1,1-Diphenyl-2-picryl-hydrazyl (DPPH) radical, superoxide anion radical, nitri...

The morphogenesis of the vertebrate hindbrain involves the generation of metameric units called rhombomeres (r), and Krox20 encodes a transcription factor that is expressed in r3 and r5 and plays a major role in this segmentation process. Our knowledge of the basis of Krox20 regulation in r3 is rather confusing, especially concerning the involvement of Hox factors. To investigate this issue, we...

Approximately calculating integrals over spherical surfaces in R3 can be done by simple extensions of one dimensional quadrature rules. This, however, does not make use of the symmetry or structure of the integration domain and potentially better schemes can be devised by directly using the integration surface in R3. We investigate several quadrature schemes for integration over a spherical sur...

K e y w o r d s L a g r a n g e interpolation, Simultaneous approximation, Freud weights 1. I N T R O D U C T I O N In this paper , we are concerned with construct ing in terpola t ing subspaces of polynomials of several variables of relat ively small dimension as well as the corresponding in terpola t ion formulae a l a Lagrange. DEFINITION 1. A (linear) subspace G C C(Rn) is called k-interpol...

A nite set of vectors S R n is called a simplex ii S is linearly dependent but all its proper subsets are independent. This concept arises in particular from stoichiometry. We are interested in this paper in the number of simplexes contained in