Abstract: The invention relates to a process for the production of a primer for consecutive DNA sequencing, in which at least two shortmers are hybridised adjacent to one another using a template and are then ligated with one another to form the primer, the process being characterised in that(a) a template in the form of a single strand of nucleotides is used in which the number of nucleotides is at least 6 and is not greater than approximately twice the total number of nucleotides of all the shortmers used, and(b) the primer formed is then separated from the template and from unreacted shortmers and recovered. The invention relates also to banks (libraries) of templates for the mentioned process.

Abstract: The present invention relates to a peptide having essentially the amino acid sequence of pancreatic secretory trypsin inhibitor (PSTI). The present invention also relates to variants of such peptide wherein one or more of the amino acids in the original sequence are replaced by other amino acids. These peptides show an advantageously modified specificity in their inhibotory action. A method of preparation of the peptides and their pharmaceutical use is also described.

Abstract: A process for DNA sequencing by the multi-primer method involving the use of oligonucleotide banks of hexamers, heptamers, octomers, or nonamers for the creation of the primer through the ligation of two or more oligomers following hybridization onto the primer site.

Abstract: A process for the purfication of synthetic oligonucleotides is described which drastically simplifies the hitherto very time consuming purification process. The deprotection solution is adsorbed without being concentrated on a carrier having reversed phase properties and optionally ion exchanger properties, the oligonuleotides without lipophilic protecting group are removed, their protecting group is cleaved off from the adsorbed oligonucleotides, the adsorbed oligonucleotides are washed and eluted from the carrier and then purified in a manner known per se.

Abstract: The invention concerns a double-stranded recombinant DNA cloning vector comprising one single insertion site for foreign DNA and one or two labelling sites adjacent or approximate to said insertion site. In the instance of two labelling sites, said sites flank the insertion site. The labelling site(s) can be individually labelled in a fashion that results in the labelling of the 3' end of either strand. The use of the invention in a process affords the ability to individually label only one strand at the 3' end in a simplified method for base sequencing analysis.