DIFFERENTIAL LABELLING METHOD
First Claim
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1. A method for selectively forming a complex of a platinum compound and a sulphur-containing reactive site of an entity or of at least one entity of a mixture of two or more entities, the entity or the mixture of two or more entities comprising one or more sulphur-containing reactive sites and one or more nitrogen-containing reactive sites, the method comprising:
- forming a complex of the platinum compound and the entity or the at least one entity of a mixture of two or more entities at a pH below the lowest pKa of the nitrogen-containing reactive sites, whereby the platinum compound is reacted with the entity such that substantially only sulphur-containing reactive sites are linked to the platinum compound;
thereby selectively forming a complex of a platinum compound and a sulphur-containing reactive site of an entity or of at least one entity of a mixture of two or more entities.
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Abstract
The invention relates to a method for differentially labelling one or more entities, together comprising distinct reactive sites. The invention further relates to an entity that has been labelled by a method according to the invention and to a diagnostic kit comprising a labelled entity and to a diagnostic kit to employ a method according to the invention.
7 Citations
15 Claims
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1. A method for selectively forming a complex of a platinum compound and a sulphur-containing reactive site of an entity or of at least one entity of a mixture of two or more entities, the entity or the mixture of two or more entities comprising one or more sulphur-containing reactive sites and one or more nitrogen-containing reactive sites, the method comprising:
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forming a complex of the platinum compound and the entity or the at least one entity of a mixture of two or more entities at a pH below the lowest pKa of the nitrogen-containing reactive sites, whereby the platinum compound is reacted with the entity such that substantially only sulphur-containing reactive sites are linked to the platinum compound; thereby selectively forming a complex of a platinum compound and a sulphur-containing reactive site of an entity or of at least one entity of a mixture of two or more entities. - View Dependent Claims (2, 3, 4, 5)
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6. A method for differentially forming a complex of a first platinum compound and a sulphur-containing reactive site of an entity or of at least one entity of a mixture of two or more entities, and a second platinum compound and a nitrogen-containing reactive site of the entity or of at least one entity of the mixture of two or more entities, the entity or the mixture of two or more entities comprising one or more sulphur-containing reactive sites and one or more nitrogen-containing reactive sites, the method comprising:
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(a) forming a first complex of the first platinum compound and the entity or the at least one entity of a mixture of two or more entities at a pH below the lowest pKa of the nitrogen-containing reactive sites, whereby the first platinum compound is reacted with the entity such that substantially none of the nitrogen-containing reactive sites, and substantially all of the sulphur-containing reactive sites, are linked to the first platinum compound; and (b) starting with the first complex, forming a second complex of the second platinum compound and the entity or the at least one entity of a mixture of two or more entities at a pH at which only nitrogen-containing reactive sites are linked to the second platinum compound; thereby differentially forming a complex of a first platinum compound and a sulphur-containing reactive site of an entity or of at least one entity of a mixture of two or more entities, and a second platinum compound and a nitrogen-containing reactive site of the entity or at least one entity of the mixture of two or more entities. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification