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PMID |
Sentence |
1 |
7526119
|
Most of the amino acid changes that give rise to antigenic variants of the protein occur in two variable regions (VR1 and VR2) that are thought to form loops on the cell surface.
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2 |
7526119
|
The polymerase chain reaction (PCR) was used to amplify the nucleotide sequences encoding VR1 and VR2 from the chromosomal DNA of N. meningitidis strain M1080.
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3 |
7526119
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Most of the amino acid changes that give rise to antigenic variants of the protein occur in two variable regions (VR1 and VR2) that are thought to form loops on the cell surface.
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4 |
7526119
|
The polymerase chain reaction (PCR) was used to amplify the nucleotide sequences encoding VR1 and VR2 from the chromosomal DNA of N. meningitidis strain M1080.
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5 |
7562997
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In the immunoblotting method, three meningococcal reference strains were used; they expressed either the P1.7,16 protein, or only its VR1 or VR2 epitopes in their class 1 proteins.
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6 |
9294871
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Bactericidal antibodies are all directed against variable regions VR1 and VR2 of the PorA sequence, corresponding to loops 1 and 4 of a two-dimensional topology model of the porin with eight extracellular loops.
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7 |
9632588
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Subtype-specific monoclonal antibodies (MAbs) directed toward two variable regions (VR1 and VR2) of the class 1 protein of Neisseria meningitidis are used in this classification scheme.
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8 |
10799451
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Of the strains with P1.5,2 sequence, one had a stop codon between the VR1 and VR2, one had a four-amino-acid deletion outside the VR2, and another showed no expression of PorA on sodium dodecyl sulfate-polyacrylamide gel electrophoresis.
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9 |
10979914
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A total of 73 different PorA types were found, and 76. 7% of these types comprise nonprototype sequences in VR1, VR2, or both.
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10 |
11474010
|
PorA VR typing showed that 91% of the P1.19,15 strains analyzed had VR1 and VR2 sequences identical to those of the prototype strain.
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11 |
12488566
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A nested PCR was therefore developed that enables the amplification of the porA gene directly from clinical samples and has the required sensitivity for nucleotide sequencing of the three main variable regions, VR1, VR2 and VR3.
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12 |
12654777
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Cross-reactivity, measured by a fourfold increase in SBA after vaccination, against these strains ranged from 23 to 92% depending on the subtype of the tested strain and was directed against both VR1 and VR2.
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13 |
12744880
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We therefore undertook a retrospective analysis of the three main variable regions, VR1, VR2 as well as VR3, of the porA gene from N. meningitidis isolated from different countries, mainly from Scotland and Sweden.
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14 |
12744880
|
No new VR1 or VR2 alleles were found but five new VR3 alleles are described.
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15 |
12744880
|
Our data indicates the importance of analysing the VR3 region of PorA in addition to VR1 and VR2 and also highlights, in general terms, the need for genosubtyping meningococci.
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16 |
12744880
|
We therefore undertook a retrospective analysis of the three main variable regions, VR1, VR2 as well as VR3, of the porA gene from N. meningitidis isolated from different countries, mainly from Scotland and Sweden.
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17 |
12744880
|
No new VR1 or VR2 alleles were found but five new VR3 alleles are described.
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18 |
12744880
|
Our data indicates the importance of analysing the VR3 region of PorA in addition to VR1 and VR2 and also highlights, in general terms, the need for genosubtyping meningococci.
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19 |
12744880
|
We therefore undertook a retrospective analysis of the three main variable regions, VR1, VR2 as well as VR3, of the porA gene from N. meningitidis isolated from different countries, mainly from Scotland and Sweden.
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20 |
12744880
|
No new VR1 or VR2 alleles were found but five new VR3 alleles are described.
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21 |
12744880
|
Our data indicates the importance of analysing the VR3 region of PorA in addition to VR1 and VR2 and also highlights, in general terms, the need for genosubtyping meningococci.
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22 |
15200858
|
We examined all available nucleotide sequences of the porA VR1 and VR2 regions to identify and define subtype families.
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23 |
15770024
|
The composition of new vaccines against Neisseria meningitidis serogroup B is based on differences in the variable regions VR1 and VR2 of the class 1 outer-membrane protein (PorA) of meningococci.
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24 |
18287297
|
Nucleotide sequences of the porA variable region 1 (VR1) and VR2 regions were determined in 52 non-serosubtypeable isolates.
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25 |
18550736
|
Amplified vOka DNA demonstrated a typical ladder pattern; however, no LAMP product was detected in reactions performed with DNAs from other human herpesviruses by either VR-1 VZV LAMP or VR-2 VZV LAMP.
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26 |
18550736
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The sensitivities of both VR-1 and VR-2 VZV LAMP determined by either the turbidity assay or agarose gel electrophoresis were 100 copies per reaction.
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27 |
18550736
|
To discriminate the vOka strain from wild-type strains, VR-1 and VR-2 VZV LAMP products were digested with the appropriate restriction enzymes (SacII for VR-1 LAMP and SmaI for VR-2 LAMP).
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28 |
18550736
|
Wild-type VZV DNA was detected in 20 swab samples by either VR-1 VZV LAMP or VR-2 VZV LAMP.
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29 |
18550736
|
Amplified vOka DNA demonstrated a typical ladder pattern; however, no LAMP product was detected in reactions performed with DNAs from other human herpesviruses by either VR-1 VZV LAMP or VR-2 VZV LAMP.
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30 |
18550736
|
The sensitivities of both VR-1 and VR-2 VZV LAMP determined by either the turbidity assay or agarose gel electrophoresis were 100 copies per reaction.
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31 |
18550736
|
To discriminate the vOka strain from wild-type strains, VR-1 and VR-2 VZV LAMP products were digested with the appropriate restriction enzymes (SacII for VR-1 LAMP and SmaI for VR-2 LAMP).
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32 |
18550736
|
Wild-type VZV DNA was detected in 20 swab samples by either VR-1 VZV LAMP or VR-2 VZV LAMP.
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33 |
18550736
|
Amplified vOka DNA demonstrated a typical ladder pattern; however, no LAMP product was detected in reactions performed with DNAs from other human herpesviruses by either VR-1 VZV LAMP or VR-2 VZV LAMP.
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34 |
18550736
|
The sensitivities of both VR-1 and VR-2 VZV LAMP determined by either the turbidity assay or agarose gel electrophoresis were 100 copies per reaction.
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35 |
18550736
|
To discriminate the vOka strain from wild-type strains, VR-1 and VR-2 VZV LAMP products were digested with the appropriate restriction enzymes (SacII for VR-1 LAMP and SmaI for VR-2 LAMP).
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36 |
18550736
|
Wild-type VZV DNA was detected in 20 swab samples by either VR-1 VZV LAMP or VR-2 VZV LAMP.
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37 |
18550736
|
Amplified vOka DNA demonstrated a typical ladder pattern; however, no LAMP product was detected in reactions performed with DNAs from other human herpesviruses by either VR-1 VZV LAMP or VR-2 VZV LAMP.
|
38 |
18550736
|
The sensitivities of both VR-1 and VR-2 VZV LAMP determined by either the turbidity assay or agarose gel electrophoresis were 100 copies per reaction.
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39 |
18550736
|
To discriminate the vOka strain from wild-type strains, VR-1 and VR-2 VZV LAMP products were digested with the appropriate restriction enzymes (SacII for VR-1 LAMP and SmaI for VR-2 LAMP).
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40 |
18550736
|
Wild-type VZV DNA was detected in 20 swab samples by either VR-1 VZV LAMP or VR-2 VZV LAMP.
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41 |
19141737
|
After this analysis, four variants of NMB0088 were identified; the variability was confined to three specific segments, designated VR1, VR2 and VR3.
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42 |
20156598
|
The analysis of surface antigens revealed variants 3-1 and 3-8 to be prevalent for porB; variant F5-1 was the most common FetA epitope, and variants 19 and 15 corresponded to the prevalent variable regions 1 (VR1) and VR2 PorA epitopes, respectively.
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43 |
21123522
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Sequencing of porA variable regions (VRs) 1 and 2 and the fetA VR was recommended for monitoring antigenic distribution and investigating potential outbreaks. porB characterization was recommended if further resolution was required.
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44 |
21337142
|
The PorA protein contains two variable loops (VR1 and VR2), each of which determine a dis- tinct set of serosubtypes.
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