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The regional distribution of poly (A) and total RNA concentrations during earlyXenopus development

✍ Scribed by Phillips, Carey R.

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
910 KB
Volume
223
Category
Article
ISSN
0022-104X

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✦ Synopsis

Abstract

Xenopus laevis embryos were oriented and sectioned into six regions along one of three axes: animal‐vegetal, dorsal‐ventral, or right‐left. Total RNA (predominantly ribosomal RNA) and poly riboadenylate [poly (A)] were measured for each region during early embryogenesis. The concentrations of both total RNA and poly(A) are nonuniformly distributed during early development. Total RNA is approximately four‐fold more concentrated in the more animal portions than the more vegetal portions of the embryo. The dorsal‐most region contains a 1.5‐fold higher concentration than in the other five regions of the four‐celled embryo along the dorsal‐ventral axis. Poly(A) concentrations show temporal and regional specific changes in concentration during early development with higher concentrations more generally found in the animal‐most regions.

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