A non-competitive fluorescence polarization immunoassay (FPIA) using a Fab fragment was developed for large molecule quantification. Most conventional FPIAs are homogeneous and competitive immunoassays. With FPIAs, it has been difficult to obtain sufficient detection sensitivity when targeting molecules like proteins. To overcome this fundamental drawback, we report FPIA fluorescence-labeled fr...

A 2-kbp DNA fragment, EO3, that was present in multiple copies in the Candida albicans genome was isolated for use in developing a detection method for C. albicans by polymerase chain reaction (PCR). Dot blot hybridization revealed that EO3 was specific for the 40 isolates of C. albicans serotypes A and B used. Using a set of primers (20-mer each) derived from the nucleotide sequence of EO3, we...

We determined the frequency of hepatitis C virus (HCV) genotypes in anti-HCV seropositive patients in the state of Alagoas, Brazil, by means of nested-reverse transcription-polymerase chain reaction (RT-nested-PCR) followed by restriction fragment length polymorphism (RFLP) of amplified fragments of the 5´NCR. The nested-PCR with genotype-specific primers from the core region was carried out wh...

Isolated variable region light chain 315 (VL-315), the VL domain of a myeloma protein of BALB/c origin, induces T cells of BALB/c (H-2d) mice that help the adoptive secondary anti-4-hydroxy-3-iodo-5-nitrophenylacetyl (NIP) antibody response to NIP-Fab315. The location of the epitope recognized by helper cells was examined with two fragments of VL-315, obtained by cleavage with cyanogen bromide ...

Four types of Fc fragments of different sizes were isolated by papain treatment of rabbit immunoglobulin G under various conditions and by subsequent chromatographic procedures. 1. Brief digestion at neutral pH without reduction produced a molecule in which the Fab and Fc fragments were still linked by a pair of labile disulphide bridges, and the Fc fragment released by cleaving these bonds, ca...

The carbonyl unit of the title compound, C(13)H(10)Cl(2)N(2)O, lies on a twofold rotation axis. The ring is aligned at 51.6 (1)° with respect to the N-C(=O)-N fragment. The two -NH- fragments of one mol-ecule form hydrogen bonds [2.845 (2) Å] to the C=O fragment of an adjacent mol-ecule, giving rise to the formation of a linear hydrogen-bonded chain.

EcoRI fragments A, B and C produced from linear phi29 DNA, but not D or E fragments, are transcribed by purified Bacillus subtilis RNA polymerase. The transcription of fragments A and C is initiated preferentially with GTP and to a lesser extent with ATP; the reverse happens in the case of fragment B. The dinucleotides GpU and GpA respectively, compete specifically with the incorporation of [ga...

In the cation of the title salt, C6H7N2S(+)·SCN(-), the C=S bond is oriented trans with respect to the C-C=N fragment in the pyridine ring. The planes of the aromatic ring and the thio-amide fragment of the cation make a dihedral angle of 38.31 (4)°. In the crystal, the components are linked by N-H⋯S and N-H⋯N, hydrogen bonds, forming a two-dimensional network parallel to (10-1).

Artificial tubular molecular pockets bearing polar functionalities on their inner surface are useful model systems for understanding the mechanisms of protein–ligand interactions in living systems. We herein report a pillar[5]arene-derived tube, [P4-(OH)BPO], whose endo conformational isomer endo-[P4-(OH)BPO] possesses an inwardly pointing hydrogen-bond (H-bond) donor (OH) its deep cavity and s...

conclusions using the pcr-rflp method, three distinctive h. pylori caga genotypes were detected in antral biopsies. genotype i, which was predominant among the isolates, was significantly associated with gastritis. however, the data showed that caga genotype iii may play a role in duodenitis and duodenal ulcers in patients infected with h. pylori. patients and methods a total of 161 gastric bio...