Vol. 43 No. 8 (1999) pp.777-868

November 1999

Cover legend

In situ hybridization detection of hsp90a mRNA in developing fast muscle fibers of a 24 hour old zebrafish embryo. Strong expression of the gene begins shortly after the dorsal and ventral blocks of fast muscle begin to form within the somite but ceases by 48 h of age as these fibers mature. The two populations of slow muscle fibers, one of which separates the blocks of fast muscle at the dorsal-ventral midline and the other which forms a narrow layer at the periphery of the somite, differentiate earlier and have downregulated hsp90a expression at this point in development. For details see "Restricted expression of the zebrafish hsp90a gene in slow and fast muscle fiber lineages" by J.B. Sass et al., in this issue.

Original articles

A cystatin-related gene, testatin/cresp, shows male-specific expression in germ and somatic cells from the initial stage of murine gonadal sex-differentiation.
Y Kanno, M Tamura, S Chuma, T Sakura, T Machida and N Nakatsuji
Int. J. Dev. Biol. (1999) 43: 777-784
Pleiotropic effects of zebrafish protein-tyrosine phosphatase-1B on early embryonic development.
A M van der Sar, J de Fockert, M Betist, D Zivkovic and J den Hertog
Int. J. Dev. Biol. (1999) 43: 785-794
Convergence of the BMP and EGF signaling pathways on Smad1 in the regulation of chondrogenesis.
K Nonaka, L Shum, I Takahashi, K Takahashi, T Ikura, R Dashner, G H Nuckolls and H C Slavkin
Int. J. Dev. Biol. (1999) 43: 795-807
Fate maps of the primitive streak in chick and quail embryo: ingression timing of progenitor cells of each rostro-caudal axial level of somites.
K Sawada and H Aoyama
Int. J. Dev. Biol. (1999) 43: 809-815
In Hydra magnipapillata the activator of protein kinase C diC8 causes multiple head formation along the body axis only when accompanied by feeding, but heavy feeding alone is sufficient to cause multiple head formation.
M Kroiher
Int. J. Dev. Biol. (1999) 43: 817-821

Technical articles

A somatic gene transfer approach using recombinant fusion proteins to map muscle-motoneuron projections in Xenopus spinal cord.
L Coen, K Kissa, S le Mevel, P Brulet and B A Demeneix
Int. J. Dev. Biol. (1999) 43: 823-830

Short contributions

The generation and in vivo differentiation of murine embryonal stem cells genetically null for either N-cadherin or N- and P-cadherin.
R Moore, G L Radice, M Dominis and R Kemler
Int. J. Dev. Biol. (1999) 43: 831-834
Restricted expression of the zebrafish hsp90alpha gene in slow and fast muscle fiber lineages.
J B Sass, C C Martin and P H Krone
Int. J. Dev. Biol. (1999) 43: 835-838
Age and gonadotropins control Ca2+-spike acquisition in mouse oocytes isolated from early preantral follicles.
J E Gomes, A Pesty, A Gouveia-Oliveira, A J Cidadão, C E Plancha and B Lefèvre
Int. J. Dev. Biol. (1999) 43: 839-842
Changes in the placenta and in the rat embryo caused by the demethylating agent 5-azacytidine.
M Vlahovic, F Bulic-Jakus, G Juric-Lekic, A Fucic, S Maric and D Serman
Int. J. Dev. Biol. (1999) 43: 843-846

The International Journal of Developmental Biology
ISSN 1696-3547 (online) and 0214-6282 (print)