The gene, rpb1, encoding the largest subunit of RNA polymerase II has been cloned from Schizosaccharomyces pombe using the corresponding gene, RPB1, of Saccharomyces cerevisiae as a cross-hybridization probe. We have determined the complete sequence of this gene, and parts of PCR-amplified rpb1 cDNA. The predicted coding sequence, interrupted by six introns, encodes a polypeptide of 1,752 amino...

Here, we investigated the gene that encodes the main protein component of the byssus in Perna perna (Ppfp) using a consensus fluorescent probe for the Mytilus group and by polymerase chain reaction amplification using specific and random primers. A 524-bp fragment resulting from polymerase chain reaction amplification was found to be homologous to the fp-1 gene of Mytilus coruscus. This fragmen...

Heat denaturation and Pronase degradation of the complex previously formed between benzylpenicillin and the exocellular DD-carboxypeptidase-transpeptidase of Actinomadura R39 yields a heptapeptide H-Leu-Pro-Ala-Ser-Asn-Gly-Val-OH, where the benzylpenicilloyl group is ester-linked to the serine residue. This linkage is very labile and its hydrolysis causes the release of benzylpenicilloate. In c...

Incubation of purified Escherichia coli biodegradative threonine dehydratase with glyoxylate resulted in covalent binding of 1 mol of glyoxylate per mol of protein with concomitant loss of enzyme activity. The glyoxylate-binding site was identified as a heptapeptide representing amino acid residues Ser-33-Asn-Tyr-Phe-Ser-Glu-Arg-39 in the protein primary structure. Addition of glyoxylate to a c...

The C-terminal domain (CTD) of the largest RNA polymerase II (RNAPII) subunit undergoes dynamic phosphorylation to support transcription-associated events and drive the transcription cycle. In mammalian cells, it comprises 52 repeats of the heptapeptide sequence Tyr(1)–Ser(2)–Pro(3)–Thr(4)–Ser(5)–Pro(6)–Ser(7). While important functions for Ser(2)-, Ser(5)-, and Ser(7)-phosphorylation have prev...

Random heptapeptide T7 and random 12mer M13 phage libraries were employed to identify mimotopes binding to monoclonal antibodies (MAb) specific to house dust mite. After selection of bound phage by bio-panning and determination of binding specificity, DNA of selected bound phages was amplified, sequenced and aligned for peptide similarity. Eight mimotopes which were partially matched with Der f...