摘要:
Large comb-type branched polynucleotides useful as amplifier molecules in nucleic acid hybridization assays are provided, the polynucleotides comprising: a polynucleotide backbone having at least about 15 multifunctional nucleotides, each of which defines a sidechain site and a first single-stranded oligonucleotide unit that is capable of binding specifically to a first single-stranded polynucleotide sequence of interest; and pendant polynucleotide sidechains extending from said multifunctional nucleotides each comprising iterations of a second single-stranded oligonucleotide unit that is capable of binding specifically to a second single-stranded polynucleotide sequence of interest, the total number of iterations in all sidechains being at least 20. Methods of making these polynucleotides are also provided.
摘要:
Novel oligonucleotide probes are provided having the structure ##STR1## wherein: R.sup.2 is lower alkyl; R.sup.3 is C.sub.1 -C.sub.12 alkylene containing 0 to 6 linkages selected from the group consisting of --O--, --S-- and --NR.sup.12 -- wherein R.sup.12 is hydrogen or lower alkyl; R.sup.5 is hydrogen or lower alkyl; R.sup.6 is selected from the group consisting of hydrogen, methyl, bromo and iodo; R.sup.7 is C.sub.1 -C.sub.12 alkylene containing 0 to 6 linkages selected from the group consisting of --O--, --S-- and --NR.sup.12 --, and bound to R.sup.8 through an --O--, --S-- or --NR.sup.12 -- moiety; and R.sup.8 is a protecting group that can be removed and replaced, without affecting the remainder of the compound, by reduction with a reducing agent. Methods for using the probes are provided as well.
摘要:
Novel N-4 modified pyrimidine analogs are provided having the structure (I) or (II) ##STR1## wherein: R.sup.1 is selected from the group consisting of hydrogen, acid-sensitive, base-stable blocking groups and acyl capping groups; R.sup.2 is lower alkyl; R.sup.3 is C.sub.1 -C.sub.12 alkylene containing 0 to 6 linkages selected from the group consisting of --0--, --S-- and --NH--; R.sup.4 is ##STR2## in which R.sup.9 is hydrogen or an optionally substituted aliphatic group; R.sup.10 and R.sup.11 are hydrocarbyl or together form a mono- or polyheterocyclic ring; R.sup.5 is hydrogen or lower alkyl; R.sup.6 is selected from the group consisting of hydrogen, methyl, bromo and iodo; R.sup.7 is C.sub.1 -C.sub.12 alkylene containing 0 to 6 linkages selected from the group consisting of --O--, --S-- and --NR.sup.12 -- wherein R.sup.12 is hydrogen or lower alkyl; and R.sup.8 is a protecting group that can be removed and replaced by reduction. Synthetic methods for preparing the compounds are provided as well, as are methods for making and using polynucleotide probes containing the novel pyrimidine analogs.
摘要翻译:提供具有结构(I)或(II)的新型N-4修饰的嘧啶类似物,其中:R1选自氢,酸敏感,碱稳定 封闭基团和酰基封端基团; R2是低级烷基; R3是含有0-6个选自-O - , - S - 和-NH-的键的C1-C12亚烷基; R4是,其中R9是氢或任选取代的脂族基; R 10和R 11是烃基或一起形成单或多杂环; R5是氢或低级烷基; R 6选自氢,甲基,溴和碘; R7是含有0-6个选自-O - , - S-和-NR12-的键的C1-C12亚烷基,其中R12是氢或低级烷基; R8是可以除去并被还原代替的保护基。 还提供了制备化合物的合成方法,以及制备和使用含有新型嘧啶类似物的多核苷酸探针的方法。
摘要:
Nucleic acid probes are immobilized on polystyrene surfaces such as the wells of microtiter plates for use in solution phase nucleic acid sandwich hybridization assays, particularly those using large branched DNA amplification multimers, by: (a) cleansing the surface by washing it sequentially with a strong acid, a strong base, and water, (b) passively adsorbing a polypeptide having primary amino groups onto the cleansed surface, and (c) covalently bonding the probe to the adsorbed polypeptide via a base-stable bifunctional crosslinking agent, and (d) subjecting the surface to conditions that simulate the hybridization conditions used in the assay.
摘要:
Nucleic acid probes are immobilized on polystyrene surfaces such as the wells of microtiter plates for use in solution phase nucleic acid sandwich hybridization assays, particularly those using large branched DNA amplification multimers, by: (a) cleansing the surface by washing it sequentially with a strong acid, a strong base, and water, (b) passively adsorbing a polypeptide having primary amino groups onto the cleansed surface, and (c) covalently bonding the probe to the adsorbed polypeptide via a base-stable bifunctional crosslinking agent, and (d) subjecting the surface to conditions that simulate the hybridization conditions used in the assay.
摘要:
Oligonucleotide functionalizing reagents are disclosed which are useful in introducing sulfhydryl, amino and additional hydroxyl groups into oligonucleotides. The reagents are substantially linear in structure, at one end provided with a phosphoramidite moiety, at an opposing end provided with a sulfhydryl, amino or hydroxyl moiety, the two ends linked through a hydrophilic spacer chain. Methods of using and synthesizing the novel reagents are disclosed as well.
摘要:
A method of generating a single-stranded nucleic acid molecule comprising (a) combining in a mixture under conditions suitable for a polymerase extension reaction, (i) a polymerase, (ii) an initial polynucleotide comprising a 5′ portion and a 3′ portion, wherein the polynucleotide forms the nucleic acid molecule 5′ end; and (iii) a plurality of overlapping template oligonucleotides each having a 5′ template portion and a 3′ portion. The method further comprises (b) hybridizing the initial polynucleotide or the extension polynucleotide and one of the template oligonucleotides; (c) incubating the mixture for sufficient time to allow an extension polynucleotide to be synthesized; (d) adding a competimer that competes with the template oligonucleotide in step (b); (e) denaturing the extension polynucleotide and template oligonucleotide; and (f) repeating steps (b), (c), (d), and (e) to generate the single-stranded nucleic acid molecule, wherein the number of repeated cycles equals the number of different template oligonucleotides.
摘要:
Apparatus for immunoassay of multiple samples of biological fluids (e.g., AIDS antibodies), the apparatus being capable of mounting for rocking during incubation. A frame receives plural test vessels so that the vessels are interconnected for circulation through all the vessels of buffers, de-ionized water and air and for discharge of waste. Each vessel is transparent and contains nitrocellulose test paper impregnated with antigens to the antibodies. Valved ports in each vessel accept sequential insertion of the biological fluids, an enzyme conjugate and color developer. Color changes in the individual test papers are observed through the transparent vessels and identify presence of antibodies in the samples.