... that the gene sets the chirality at the one-cell stage, the earliest observed symmetry-breaking event linked directly to body handedness in the animal kingdom. The early intracellular chirality is superseded by the inter-cellular chirality during the 3rd cleavage, leading to asymmetric nodal and Pitx expression...

... and protoderm . Protoplasma   192 , 178 - 188 . 10.1007/BF01273890 Bergmann , D. C. , Crew , J. R. , Kramer , J. M. and Wood , W. B. ( 1998 ). Cuticle chirality and body handedness in Caenorhabditis elegans . Dev. Genet.   23 , 164 - 174 . http://dx.doi.org/10.1002/(SICI)1520...

... Handedness Mouse embryo Intra-flagellar transport Lefty2 Hnf3β Dynein is a large multi-subunit protein complex consisting of two heavy chains complexed to intermediate, light intermediate and/or light chains( Harrison and King, 2000 ). The dynein family has been divided into two subfamilies...

... LR symmetric. At later stages, however, the larva undergoes differential LR development to form the adult rudiment on the left side of the body ( Czihak, 1965 ; Okazaki, 1975 ). Sea urchin Adult rudiment Left-right asymmetry Half embryo Handedness © 2001. 2001 28 9 2001...

... of iv/iv cells to both the heart and the visceral yolk-sac. * Author for correspondence 21 08 1990 © 1990 by Company of Biologists 1990 asymmetry handedness chimeras situs inversus Handed asymmetry is the consistent difference between left and right sides...

.... We propose a model for the development of handedness in bilateral animals, comprising three components. (I) A process termed conversion , in which a molecular handedness is converted into handedness at the cellular level. A specific model for this process is put forward, based on cell polarity...

... direction for the intercalation of new positional values. © 1989 by Company of Biologists 1989 Tetrahymena thermophila mirror image ciliary rows handedness doublet positional information References Allen , R. D. ( 1967 ). Fine structure, reconstruction, and possible...

...Lorette C. Javois; Laurie E. Iten ABSTRACT The pattern of differentiated wing structures formed following 180° rotation of the undifferentiated wing bud tip on its base was examined in detail. These analyses were performed to determine the handedness and origin of the supernumerary structures which...