ISSN:
1432-041X
Keywords:
Key words Engrailed
;
Onychophora
;
Velvet worm
;
Segmentation
;
Mesoderm
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract We have identified an engrailed-class (en-class) gene and determined the distribution pattern of its protein during embryogenesis in a member of the Onychophora. The results of this work add to our understanding of the evolution of development and in addition, they contribute information toward clarifying the phylogenetic position of this group. We observe transient expression in a portion of each developing segment. By the time limbs have formed, segmental expression of en-class protein is restricted to the mesoderm. This pattern shares important spatio-temporal characteristics with those of Annelida and Arthropoda, both of which have members that express en-class genes segmentally in mesoderm and ectoderm.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s004270050115
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