Abstract: The present invention relates to an annealing control primer for improving annealing specificity in nucleic acid amplification and its applications to all fields of nucleic acid amplification-involved technology. The present primer comprises (a) a 3?-end portion having a hybridizing nucleotide sequence substantially complementary to a site on a template nucleic acid to hybridize therewith; (b) a 5?-end portion having a pre-selected arbitrary nucleotide sequence; and (c) a regulator portion positioned between said 3?-end portion and said 5?-end portion comprising at least one universal base or non-discriminatory base analog, whereby said regulator portion is capable of regulating an annealing portion of said primer in association with annealing temperature.

Abstract: The present invention relates to various processes by a template-dependent extension reaction using a dual specificity oligonucleotide and a dual specificity oligonucleotide composed of three different Tm portions therefor. Demonstrated in the present invention are the features of the dual specificity oligonucleotide, which are high hybridization specificity and mismatch tolerance.

Abstract: The present invention relates to an annealing control primer for improving annealing specificity in nucleic acid amplification and its applications to all fields of nucleic acid amplification-involved technology. The present primer comprises (a) a 3?-end portion having a hybridizing nucleotide sequence substantially complementary to a site on a template nucleic acid to hybridize therewith; (b) a 5?-end portion having a pre-selected arbitrary nucleotide sequence; and (c) a regulator portion positioned between said 3?-end portion and said 5?-end portion comprising at least one universal base or non-discriminatory base analog, whereby said regulator portion is capable of regulating an annealing portion of said primer in association with annealing temperature.

Abstract: The present invention relates to an annealing control primer for improving annealing specificity in nucleic acid amplification and its applications to all fields of nucleic acid amplification-involved technology. The present primer comprises (a) a 3?-end portion having a hybridizing nucleotide sequence substantially complementary to a site on a template nucleic acid to hybridize therewith; (b) a 5?-end portion having a pre-selected arbitrary nucleotide sequence; and (c) a regulator portion positioned between said 3?-end portion and said 5?-end portion comprising at least one universal base or non-discriminatory base analog, whereby said regulator portion is capable of regulating an annealing portion of said primer in association with annealing temperature.

Abstract: The present invention relates to various processes by a template-dependent extension reaction using a dual specificity oligonucleotide and a dual specificity oligonucleotide composed of three different Tm portions therefor. Demonstrated in the present invention are the features of the dual specificity oligonucleotide, which are high hybridization specificity and mismatch tolerance.

Abstract: The present invention relates to an annealing control primer for improving annealing specificity in nucleic acid amplification and its applications to all fields of nucleic acid amplification-involved technology. The present primer comprises (a) a 3?-end portion having a hybridizing nucleotide sequence substantially complementary to a site on a template nucleic acid to hybridize therewith; (b) a 5?-end portion having a pre-selected arbitrary nucleotide sequence; and (c) a regulator portion positioned between said 3?-end portion and said 5?-end portion comprising at least one universal base or non-discriminatory base analog, whereby said regulator portion is capable of regulating an annealing portion of said primer in association with annealing temperature.

Abstract: The present invention relates to various processes by a template-dependent extension reaction using a dual specificity oligonucleotide and a dual specificity oligonucleotide composed of three different Tm portions therefor. Demonstrated in the present invention are the features of the dual specificity oligonucleotide, which are high hybridization specificity and mismatch tolerance.

Abstract: The present invention relates to an annealing control primer for improving annealing specificity in nucleic acid amplification and its applications to all fields of nucleic acid amplification-involved technology. The present primer comprises (a) a 3?-end portion having a hybridizing nucleotide sequence substantially complementary to a site on a template nucleic acid to hybridize therewith; (b) a 5?-end portion having a pre-selected arbitrary nucleotide sequence; and (c) a regulator portion positioned between said 3?-end portion and said 5?-end portion comprising at least one universal base or non-discriminatory base analog, whereby said regulator portion is capable of regulating an annealing portion of said primer in association with annealing temperature.

Abstract: The present invention relates to various processes by a template-dependent extension reaction using a dual specificity oligonucleotide and a dual specificity oligonucleotide composed of three different Tm portions therefor. Demonstrated in the present invention are the features of the dual specificity oligonucleotide, which are high hybridization specificity and mismatch tolerance.

Abstract: The present invention relates to a method for amplifying an unknown nucleotide sequence adjacent to a known nucleotide sequence, which comprises the step of (a) performing a primary amplification of said unknown nucleotide sequence using a DNA walking annealing control primer (DW-ACP) and a first target-specific primer; in which said step (a) comprises: (a-1) performing a first-stage amplification of said unknown nucleotide sequence at a first annealing temperature, comprising at least one cycle of primer annealing, primer extending and denaturing using a first degenerate DW-ACP containing a degenerate random nucleotide sequence to hybridize with said unknown nucleotide sequence and a hybridizing nucleotide sequence substantially complementary to a site on said unknown nucleotide sequence; and (a-2) performing a second-stage amplification at a second annealing temperature to render said first degenerate DW-ACP not to function as a primer.

Abstract: The present invention relates to an annealing control primer for improving annealing specificity in nucleic acid amplification and its applications to all fields of nucleic acid amplification-involved technology. The present primer comprises (a) a 3?-end portion having a hybridizing nucleotide sequence substantially complementary to a site on a template nucleic acid to hybridize therewith; (b) a 5?-end portion having a pre-selected arbitrary nucleotide sequence; and (c) a regulator portion positioned between said 3?-end portion and said 5?-end portion comprising at least one universal base or non-discriminatory base analog, whereby said regulator portion is capable of regulating an annealing portion of said primer in association with annealing temperature.

Abstract: The present invention relates to various processes by a template-dependent extension reaction using a dual specificity oligonucleotide and a dual specificity oligonucleotide composed of three different Tm portions therefor. Demonstrated in the present invention are the features of the dual specificity oligonucleotide, which are high hybridization specificity and mismatch tolerance.

Abstract: The present invention relates to a method for amplifying an unknown nucleotide sequence adjacent to a known nucleotide sequence, which comprises the step of (a) performing a primary amplification of said unknown nucleotide sequence using a DNA walking annealing control primer (DW-ACP) and a first target-specific primer; in which said step (a) comprises: (a-1) performing a first-stage amplification of said unknown nucleotide sequence at a first annealing temperature, comprising at least one cycle of primer annealing, primer extending and denaturing using a first degenerate DW-ACP containing a degenerate random nucleotide sequence to hybridize with said unknown nucleotide sequence and a hybridizing nucleotide sequence substantially complementary to a site on said unknown nucleotide sequence; and (a-2) performing a second-stage amplification at a second annealing temperature to render said first degenerate DW-ACP not to function as a primer.

Abstract: The present invention relates to an annealing control primer for improving annealing specificity in nucleic acid amplification and its applications to all fields of nucleic acid amplification-involved technology. The present primer comprises (a) a 3?-end portion having a hybridizing nucleotide sequence substantially complementary to a site on a template nucleic acid to hybridize therewith; (b) a 5?-end portion having a pre-selected arbitrary nucleotide sequence; and (c) a regulator portion positioned between said 3?-end portion and said 5?-end portion comprising at least one universal base or non-discriminatory base analog, whereby said regulator portion is capable of regulating an annealing portion of said primer in association with annealing temperature.

Abstract: The present invention relates to an oligonucleotide for analyzing a target nucleotide sequence by hybridization and its applications. The oligonucleotide has the following general structure: 5?-Xp—Yq-Zr-3? or 5?-Zr—Yq-Xp-3? wherein Xp represents a first hybridization portion having a specific hybridizing nucleotide sequence substantially complementary to said target nucleotide sequence in said sample nucleic acid to hybridize therewith; Yq represents a regulator portion comprising at least two universal bases or non-discriminatory base analogs; Zr represents a second hybridization portion having a pre-selected arbitrary nucleotide sequence; p, q and r represent the number of nucleotides; and X, Y and Z is deoxyribonucleotide or ribonucleotide.

Abstract: The present invention relates to an annealing control primer for improving annealing specificity in nucleic acid amplification and its applications to all fields of nucleic acid amplification-involved technology. The present primer comprises (a) a 3′-end portion having a hybridizing nucleotide sequence substantially complementary to a site on a template nucleic acid to hybridize therewith; (b) a 5′-end portion having a pre-selected arbitrary nucleotide sequence; and (c) a regulator portion positioned between said 3′-end portion and said 5′-end portion comprising at least one universal base or non-discriminatory base analog, whereby said regulator portion is capable of regulating an annealing portion of said primer in association with annealing temperature.

Abstract: The present invention is directed to a novel annealing control primer system (“ACP system”), for regulating primer annealing specificity during polymerase chain reaction (PCR). The principle of the ACP system is based on the composition of an oligonucleotide primer having 3′- and 5′-end distinct portions separated by a deoxyinosine group, which is a unique feature of this invention. The present invention also provides a process using the ACP system for performing two stage PCR amplifications to selectively amplify a target nucleic acid fragment from a nucleic acid or a mixture. The present invention also provides a method using the ACP system for detecting and cloning differentially expressed mRNAs in two or more nucleic acid samples. Kits containing ACP are included within the scope of the present invention. Furthermore, the present invention can be adapted to almost unlimited application in all fields of PCR-based technology.

Abstract: Expression of the polynucleotide molecule, Psx, is restricted to placenta, and in particular, to placenta trophoblast cell layers during embryogenesis. The expression pattern of Psx is exploited to detect trophoblast specific lineages, such as labyrinthine trophoblast layer and giant cells. The invention provides an isolated DNA molecule encoding Psx protein, and chimeric constructs, vector and host cells containing the isolated DNA. Also provided is a method for identifying putative abortion-inducing agents, which may offer an alternative to surgical abortion.

Abstract: This invention relates a novel gene which is induced by water deficit and abscisic acid. The gene encodes for a transcription factor, particularly homeodomain-leucine zipper transcription factor which contains a transcriptional activation domain in the C-terminal region and a DNA-binding domain in the N-terminal region. The gene can be cloned into an expression vector to produce a recombinant DNA expression system suitable for insertion into cells to form a transgenic plant transformed with this gene. The gene of this invention can be also used to produce transgenic plants which exhibit enhanced resistance to drought.