Abstract：
:The alpha-amylase mRNAs which accumulate in two different tissues of the mouse, the salivary gland and the liver, are identical except for their 5' non-translated sequences: the 5' terminal 158 nucleotides of the major liver alpha-amylase mRNA are unrelated to the 5' terminal 47 nucleotides found in its salivary gland counterpart. DNA that specifies the 5'terminal one-quarter of these mRNAs has been isolated through genomic cloning and sequenced. The initial 161 nucleotides of the liver alpha-amylase mRNA are specified by DNA sequences that lie 4.5 kb upstream from those for the common body of the two mRNAs. In contrast, the 5' terminal 50 nucleotides of the salivary gland alpha-amylase mRNA are found 7.5 kb from sequences that the two mRNAs share in the genome. These cloned DNA sequences occur once per haploid genome, indicating that both the salivary gland and liver alpha-amylase mRNAs are transcribed from the same gene (Amy1A). Since no rearrangement of these DNA sequences can be detected among mouse sperm, salivary gland or liver preparations, gross rearrangement does not account for the tissue-specific pattern of expression observed for Amy1A. Rather, these data indicate that the salivary gland and liver alpha-amylase mRNAs are differentially transcribed and/or processed from identical DNA sequences in different tissues.
journal_name
Celljournal_title
Cellauthors
Young RA,Hagenbüchle O,Schibler Udoi
10.1016/0092-8674(81)90140-9subject
Has Abstractpub_date
1981-02-01 00:00:00pages
451-8issue
2eissn
0092-8674issn
1097-4172pii
0092-8674(81)90140-9journal_volume
23pub_type
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