Isolation of Total RNA Using Monophasic Lysis Reagents
A typical mammalian cell contains ∼10-5 µg of RNA, 80%-85% of which is ribosomal RNA (rRNA; chiefly the 28S, 18S, 5.8S, and 5S species). Most of the remaining 15%-20% consists of a variety of low-molecular-weight species (e.g., transfer RNAs [tRNAs] and small nuclear RNAs). These abundant RNAs are of defined size and sequence. In contrast, messenger RNA (mRNA), which makes up between 1% and 5% of the total cellular RNA, is heterogeneous in both size-from a few hundred bases to many kilobases in length-and sequence. In this introduction, the development and use of monophasic lysis reagents for the isolation of total RNA from eukaryotic cells is discussed.

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Cobalt-CatalyzedDefluorosilylation of Aryl Fluorides via Grignard Reagent Formation
Transition-metal-catalyzed transformations of the carbon-fluorine bond not only tackle an interesting problem of challenging bond activation but also offer new synthetic strategies where the relatively inert C-F bond is converted to versatile functional groups. Herein we report a practical cobalt-catalyzedsilylation of aryl fluorides that uses a cheap electrophilic silicon source with magnesium. This method is compatible with various silicon sources and can be operated under aerobic conditions. Mechanistic studies support the in situ formation of a Grignard reagent, which is captured by the electrophilic silicon source.
A DAPI-Based Reagent for Mass Cytometry
Multiparametric single cell analysis has seen dramatic improvements with the introduction of Mass Cytometry (MC) and Imaging Mass Cytometry (IMC™). These technologies expanded the number of biomarkers that can be identified simultaneously by using heavy isotope-tagged antibody reagents. Small molecule probes bearing heavy isotopes are emerging as additional useful functional reporters of cellular features.
Realizing this, we explored the iodination of DAPI to produce a heavy atom substituted derivative of the commonly used fluorescent DNA stain. Although exhibiting a drastically reduced fluorescence emission profile, I-DAPI retains strong binding affinity for DNA. I-DAPI was used to detect cellular DNA in MC and IMC™ assays with comparable efficiency to known Ir containing DNA intercalators. This work suggests repurposing of well-known colorimetric stains through simple reactions could be an effective strategy to develop new, functional MC and IMC™ reagents.
Cautionary note on contamination of reagents used for molecular detection of SARS-CoV-2
Reverse transcription (RT)-PCR, the principal diagnostic method applied in the world-wide struggle against COVID-19, is capable of detecting a single molecule of a viral genome. Correctly designed and practiced RT-PCR assays for SARS-CoV-2 should not cross react with similar but distinct viral pathogens, such as the coronaviruses associated with the common cold, and should perform with very high analytical sensitivity. This analytical performance is predicated on the ability of the method to detect the presence of the selected nucleic acid target, without detection of a false positive signal.
Influence of reagent lots and multiple measuring systems on estimating the coefficient of variation from quality control data; implications for uncertainty estimation and interpretation of QC results
- AbstractBackgroundClinical laboratories use internal quality control (QC) data to calculate standard deviation (SD) and coefficient of variation (CV) to estimate uncertainty of results and to interpret QC results. We examined the influence of different instruments, and QC and reagent lots on the CV calculated from QC data.MethodsResults for BioRadMultiqual frozen liquid QC samples over a 2-year interval were partitioned by QC and reagent lots.
- The mean and CV were calculated for each partition for each of three Abbott Architect c8000 instruments for measuring serum alanine amino transferase (ALT), creatinine (enzymatic), glucose and sodium.ResultsCVs differed among partitions and instruments for two QC levels by 5.8- and 3.3-fold for ALT, by 4.7- and 2.1-fold for creatinine, by 2.0- and 2.6-fold for glucose, and by 2.1- and 2.0-fold for sodium. Pooled CVs for two QC levels varied among instruments by 1.78- and 1.11-fold for ALT, by 1.63- and 1.11-fold for creatinine, by 1.08- and 1.06-fold for glucose, and by 1.24- and 1.31-fold for sodium.
- ConclusionsThe CVs from QC data varied substantially among QC and reagent lots and for different identical specification instruments. The CV used to estimate uncertainty for a measurement result or as the basis for interpreting individual QC results must be derived over a sufficient time interval to obtain a pooled CV that represents “typical” performance of a measuring system. An estimate of uncertainty provided to users of laboratory results will itself have uncertainty that can influence medical decisions.
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| WAT1028 | Scientific Laboratory Supplies | EACH | EUR 49.95 |
Albumin, Human Serum (Azide Free) (HSA) |
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| MBS6120697-025mg | MyBiosource | 0.25(mg | EUR 495 |
Albumin, Human Serum (Azide Free) (HSA) |
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| MBS6120697-1mg | MyBiosource | 1mg | EUR 1000 |
Albumin, Human Serum (Azide Free) (HSA) |
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| MBS6120697-5x1mg | MyBiosource | 5x1mg | EUR 4350 |
ALB (ALB, Serum albumin) (Azide free) (HRP) |
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| MBS6121446-02mL | MyBiosource | 0.2(mL | EUR 980 |
ALB (ALB, Serum albumin) (Azide free) (HRP) |
|||
| MBS6121446-5x02mL | MyBiosource | 5x0.2mL | EUR 4250 |
VEX Exosome Isolation Reagent (from serum) |
|||
| R602 | Vazyme | 10 ml | EUR 769.2 |
Albumin, Human Serum (BSA) (BSA & Azide Free) |
|||
| MBS6120698-025mg | MyBiosource | 0.25(mg | EUR 445 |
Albumin, Human Serum (BSA) (BSA & Azide Free) |
|||
| MBS6120698-1mg | MyBiosource | 1mg | EUR 1015 |
Albumin, Human Serum (BSA) (BSA & Azide Free) |
|||
| MBS6120698-5x1mg | MyBiosource | 5x1mg | EUR 4415 |
Human Serum Albumin Antigen, Reagent Grade |
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| MBS568775-100g | MyBiosource | 100g | EUR 1240 |
Human Serum Albumin Antigen, Reagent Grade |
|||
| MBS568775-5x100g | MyBiosource | 5x100g | EUR 5385 |
Human Serum Albumin Antigen, Reagent Grade |
|||
| ND-R0097 | Novatein Biosciences, Inc. | 1 Each | Ask for price |
Albumin, Human Serum (BSA and Azide Free) (HSA) |
|||
| MBS6120696-1mg | MyBiosource | 1(mg | EUR 1055 |
Albumin, Human Serum (BSA and Azide Free) (HSA) |
|||
| MBS6120696-5x1mg | MyBiosource | 5x1mg | EUR 4600 |
Bovine Serum Albumin ? Heat Shock, Reagent Grade, pH 7.0 |
|||
| 7917-100 | Biovision | each | EUR 783.6 |
Bovine Serum Albumin ? Heat Shock, Reagent Grade, pH 7.0 |
|||
| 7917-25 | Biovision | each | EUR 294 |
Bovine Serum Albumin ? Heat Shock, Reagent Grade, pH 7.0 |
|||
| 7917-5 | Biovision | each | EUR 144 |
T-Pro Total Exosome Isolation reagent (from serum) |
|||
| JO66-V002M | T-Pro Biotechnology | 25ml/BT | EUR 800 |
T-Pro Total Exosome Isolation reagent (from serum) |
|||
| JO66-V002S | T-Pro Biotechnology | 1ml*5/set | EUR 200 |
Albumin Depletion Reagent for Plasma and Serum (10 ml) NEW! |
|||
| P5W13 | 101Bio | 10 rxn | EUR 99 |
ExoQualiTM Overall Exosome Isolation Reagent (from serum) |
|||
| CEIK-044L-30T | Creative Bioarray | 30 T | Ask for price |
ExoQualiTM Overall Exosome Isolation Reagent (from serum) |
|||
| CEIK-044L-50T | Creative Bioarray | 50 T | Ask for price |
Recombinant Human Serum Albumin, From Plant (Reagent Grade) |
|||
| H2630 | Solarbio Life Science |
|
|
OPEF01351-100G - Human Serum Albumin Antigen Reagent Grade |
|||
| OPEF01351-100G | Aviva Systems Biology | 100g | EUR 1302 |
PON3, NT (Serum Paraoxonase/Lactonase 3) (Azide free) (HRP) |
|||
| MBS6491998-02mL | MyBiosource | 0.2mL | EUR 980 |
PON3, NT (Serum Paraoxonase/Lactonase 3) (Azide free) (HRP) |
|||
| MBS6491998-5x02mL | MyBiosource | 5x0.2mL | EUR 4250 |
MinuteTM Albumin Depletion Reagent for Plasma and Serum (20 ml) |
|||
| WA-013 | Inventbiotech | each | EUR 135 |
RAT SERUM WITH 0.09% AZIDE Serum Products |
|||
| GWB-Q00021 | GenWay Biotech | 10 ml | Ask for price |
RAT SERUM WITH 0.09% AZIDE Serum Products |
|||
| GWB-Q00022 | GenWay Biotech | 50 ml | Ask for price |
RAT SERUM WITH 0.09% AZIDE Serum Products |
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| GWB-Q00023 | GenWay Biotech | 100 ml | Ask for price |
Human IgG (serum origin, purified >97%, low endotoxin, azide free) |
|||
| 20007-1-LE-1 | Alpha Diagnostics | 1 mg | EUR 196.8 |
Albumin Bovine (pH 7) fraction V Reagent Grade (Bovine Serum Albumin, BSA), 99% |
|||
| 65186 | Sisco Laboratories | 10 Gms | EUR 38.4 |
|
Description: Part B |
|||
SAA4, CT (SAA4, CSAA, Serum amyloid A-4 protein, Constitutively expressed serum amyloid A protein) (Azide free) (HRP) |
|||
| MBS6344814-02mL | MyBiosource | 0.2mL | EUR 980 |
SAA4, CT (SAA4, CSAA, Serum amyloid A-4 protein, Constitutively expressed serum amyloid A protein) (Azide free) (HRP) |
|||
| MBS6344814-5x02mL | MyBiosource | 5x0.2mL | EUR 4250 |
PON2, ID (PON2, Serum paraoxonase/arylesterase 2, Aromatic esterase 2, Serum aryldialkylphosphatase 2) (Azide free) (HRP) |
|||
| MBS6335888-02mL | MyBiosource | 0.2mL | EUR 980 |
PON2, ID (PON2, Serum paraoxonase/arylesterase 2, Aromatic esterase 2, Serum aryldialkylphosphatase 2) (Azide free) (HRP) |
|||
| MBS6335888-5x02mL | MyBiosource | 5x0.2mL | EUR 4250 |
PON2, NT (PON2, Serum paraoxonase/arylesterase 2, Aromatic esterase 2, Serum aryldialkylphosphatase 2) (Azide free) (HRP) |
|||
| MBS6335899-02mL | MyBiosource | 0.2mL | EUR 980 |
PON2, NT (PON2, Serum paraoxonase/arylesterase 2, Aromatic esterase 2, Serum aryldialkylphosphatase 2) (Azide free) (HRP) |
|||
| MBS6335899-5x02mL | MyBiosource | 5x0.2mL | EUR 4250 |
EZ-DNA Reagents |
|||
| SK8201 | Bio Basic | 100preps | EUR 112.2 |
CRP Free Serum |
|||
| GWB-FD777C | GenWay Biotech | 50 ml | Ask for price |
CRP Free Serum |
|||
| MBS318434-50mL | MyBiosource | 50mL | EUR 1115 |
CRP Free Serum |
|||
| MBS318434-5x50mL | MyBiosource | 5x50mL | EUR 4765 |
CRP free serum |
|||
| MBS663102-1Unit | MyBiosource | 1Unit | EUR 875 |
CRP free serum |
|||
| MBS663102-5x1Unit | MyBiosource | 5x1Unit | EUR 3530 |
Reagents Module Assy. |
|||
| U10071 | DIALAB | 1 Each | Ask for price |
Human IgG-Biotin (serum origin, purified >97%, low endotoxin, azide free) |
|||
| 20007-1-LE-BTN | Alpha Diagnostics | 100 ug | EUR 343.2 |
APCS, CT (APCS, PTX2, Serum amyloid P-component, 9.5S alpha-1-glycoprotein, Serum amyloid P-component(1-203)) (Azide free) (HRP) |
|||
| MBS6274207-02mL | MyBiosource | 0.2mL | EUR 980 |
APCS, CT (APCS, PTX2, Serum amyloid P-component, 9.5S alpha-1-glycoprotein, Serum amyloid P-component(1-203)) (Azide free) (HRP) |
|||
| MBS6274207-5x02mL | MyBiosource | 5x0.2mL | EUR 4250 |
OOSA10429-10ML - Rat SERUM WITH 0.09% AZIDE Serum & Cells |
|||
| OOSA10429-10ML | Aviva Systems Biology | 10ml | EUR 279 |
OOSA10433-100ML - Rat SERUM WITH 0.09% AZIDE Serum & Cells |
|||
| OOSA10433-100ML | Aviva Systems Biology | 100ml | EUR 1799 |
Steroid Free Serum |
|||
| 90R-1007 | Fitzgerald Industries International | 50 mL | Ask for price |
Ecl Detection Reagents |
|||
| RPN3004 | Scientific Laboratory Supplies | EACH | EUR 552.9 |
Myoglobin free serum |
|||
| MBS663104-1Unit | MyBiosource | 1Unit | EUR 845 |
Myoglobin free serum |
|||
| MBS663104-5x1Unit | MyBiosource | 5x1Unit | EUR 3460 |
RAT SERUM WITH 0.09% AZIDE |
|||
| MBS238234-10mL | MyBiosource | 10mL | EUR 385 |
RAT SERUM WITH 0.09% AZIDE |
|||
| MBS238234-5x10mL | MyBiosource | 5x10mL | EUR 1565 |
RAT SERUM WITH 0.09% AZIDE |
|||
| MBS238236-100mL | MyBiosource | 100mL | EUR 2170 |
RAT SERUM WITH 0.09% AZIDE |
|||
| MBS238236-5x100mL | MyBiosource | 5x100mL | EUR 9600 |
Rat EGF Construction Kit w/Developing Reagents |
|||
| RRF312CKC | Antigenix America | - | Ask for price |
Rat SCF Construction Kit w/Developing Reagents |
|||
| RRF432CKC | Antigenix America | - | Ask for price |
PON1, ID (PON1, PON, Serum paraoxonase/arylesterase 1, Aromatic esterase 1, K-45, Serum aryldialkylphosphatase 1) (Azide free) (HRP) |
|||
| MBS6335877-02mL | MyBiosource | 0.2mL | EUR 980 |
PON1, ID (PON1, PON, Serum paraoxonase/arylesterase 1, Aromatic esterase 1, K-45, Serum aryldialkylphosphatase 1) (Azide free) (HRP) |
|||
| MBS6335877-5x02mL | MyBiosource | 5x0.2mL | EUR 4250 |
Rat CNTF Construction Kit w/Developing Reagents |
|||
| RRF426CKC | Antigenix America | - | Ask for price |
Reagents Refrigiration Assy. |
|||
| U10072 | DIALAB | 1 Each | Ask for price |
Rat VEGF Construcition Kit w/Developing Reagents |
|||
| RRF501CKC | Antigenix America | - | Ask for price |
Rat RANTES Construction Kit w/Developing Reagents |
|||
| RRF424CKC | Antigenix America | - | Ask for price |
Rat Leptin Construction Kit w/Developing Reagents |
|||
| RRF430CKC | Antigenix America | - | Ask for price |
CHO Transfection Reagent and Protein Expression System I (Adherent Culture with Serum) |
|||
| L3400 | Solarbio Life Science |
|
|
Myeloperoxidase Free Serum |
|||
| GWB-B28A30 | GenWay Biotech | 50 ml | Ask for price |
