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D Lipman

Publications and source records attributed to D Lipman.

5 recordsLinked to original sources

Ancient conserved regions in new gene sequences and the protein databases.

Sets of new gene sequences from human, nematode, and yeast were compared with each other and with a set of Escherichia coli genes in order to detect ancient evolutionarily conserved regions (ACRs) in the encoded proteins. Nearly all of the ACRs so identified were found to be homologous to sequences in the protein databases. This suggests that currently known proteins may already include representatives of most ACRs and that new sequences not similar to any database sequence are unlikely to contain ACRs. Preliminary analyses indicate that moderately expressed genes may be more likely to contain ACRs than rarely expressed genes. It is estimated that there are fewer than 900 ACRs in all.

Amino Acid Sequence↗

Nucleotide sequence analysis of the BALB/c murine sarcoma virus transforming gene.

We determined the nucleotide sequence of the v-H-ras-related oncogene of BALB/c murine sarcoma virus. This oncogene contains an open reading frame of 189 amino acids that initiates and terminates entirely within the mouse cell-derived ras sequence. The protein encoded by this open reading frame matches the sequence predicted for the T24 human bladder carcinoma oncogene product, p21, in all but two positions. The presence of a lysine residue in position 12 of BALB/c murine sarcoma virus p21 likely accounts for its oncogenic properties.

Animals↗