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. 1986 Nov 25;14(22):9193–9211. doi: 10.1093/nar/14.22.9193

Analysis of tropomyosin cDNAs isolated from skeletal and smooth muscle mRNA.

J Flach, G Lindquester, S Berish, K Hickman, R Devlin
PMCID: PMC311938  PMID: 3786149

Abstract

Several clones containing alpha tropomyosin sequences were isolated from cDNA libraries prepared from quail skeletal or smooth muscle RNA. All of these clones contain identical sequences coding for amino acids 81-257 of alpha skeletal muscle tropomyosin where they overlap, strongly indicating they are derived from the same gene. However, there are differences among these clones in sequences coding for the final 27 amino acids, as well as 3' untranslated sequences. In addition, S1 nuclease and Northern analyses indicate that coding sequences at the 5' end of the tropomyosin mRNA are also differentially expressed in smooth and skeletal muscle. These data point to the likelihood that differential splicing at both the 5' and 3' ends of a single tropomyosin gene results in the appearance of multiple tissue-specific transcripts.

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