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With bottom-up proteomics, we quantify peptides in the sample and then infer the protein level quantitation from that data. However, due to post-translational modifications, different protein isoforms, etc. we don’t always expect that all peptides associated with the...
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How is the protein level fold-change computed on proteomics data using Assembler app?
With bottom-up proteomics, we quantify peptides in the sample and then infer the protein level quantitation from that data. However, due to post-translational modifications, different protein isoforms, etc. we don’t always expect that all peptides associated with the...
![Computing protein confidence with improved accuracy by reassessing peptide confidence during protein grouping](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="560" height="560"><rect width="100%" height="100%"><animate attributeName="fill" values="rgba(153,153,153,0.5);rgba(153,153,153,0.1);rgba(153,153,153,0.5)" dur="2s" repeatCount="indefinite" /></rect></svg>)
Computing protein confidence with improved accuracy by reassessing peptide confidence during protein grouping
ProteinPilot software 4.0 and higher releases include a new method for calculating protein confidences that improves reliability at the end of protein lists. Figure 1 shows a simulated example that demonstrates how more accurate protein confidence is computed. Figure...
Intabio acquisition expands SCIEX portfolio of impactful solutions to accelerate biotherapeutic development
Due to the nature of their production, biotherapeutics are difficult to manufacture. Growth conditions, purification protocols and formulation requirements can introduce unintended modifications into the protein structure that may affect its efficacy and safety.
Mycotoxin concerns amidst a pandemic: a discussion on how to optimize your food safety analysis
Read time: 4 Minutes The COVID-19 pandemic has increased the need to store and transport raw and finished food products in order to sustain the richness of the food supply chain. Therefore, having a robust post-harvest support system that monitors moisture levels and...
Breaking down the SCIEX Triple Quad™ 7500 LC-MS/MS System – QTRAP® Ready
Sensitivity and robustness carry different meanings in the world of mass spectrometry. Generally, sensitivity refers to an instrument’s ability to achieve lower limits of detection (LOD). Robustness, on the other hand, refers to an instrument’s ability to consistently...
The Echo® MS System: Is it reproducible? Yes… yes… yes!
The Echo® MS System is an exciting new platform that dramatically speeds sample analysis for quantitative MS studies. Because of its unique and innovative technology, the system can analyze samples faster than ever before—but without the need for LC.
The honey sting
As a consumer it’s hard for me not to feel inundated with claims that our food is “all-natural” or “chemical-free” or that we should buy certain “superfoods” for their health benefits. We read labels and trust that the product we are buying is what we are truly...
Scale it up! The Echo® MS System delivers unprecedented levels of productivity
Imagine the productivity gains your lab could achieve with a technology that not only analyzes samples up to 50x faster than conventional quantitative LC-MS, but also eliminates tedious sample preparation, time-consuming LC method development and chromatographic run...
Top 7 Echo® MS System customer questions—answered
You asked, we answered! The Echo® MS System launched earlier this year, and has created a buzz in the industry, with analysis speeds of up to 3 samples per second. This is up to 50x faster than the conventional LC-MS/MS. This revolutionary tool for drug discovery and...
How fast is fast? The Echo® MS System sets the record
Cheetahs. Usain Bolt. Tachyons. The Echo® MS System. What do these things have in common? They’re all fast. REALLY fast. In fact, they’re the fastest in their categories: the fastest land mammal, the fastest human sprinter, the fastest subatomic particle and the...
Innovation that’s blasting through limitations in explosive detection
Mass spectrometry’s important role in identifying explosives The need for rapid explosive detection is now an unfortunate reality. The remit is multifaceted. The first is for preventative purposes, to protect us from any threat to life. The second is in the...
A new generation of therapeutic modalities
There are over 7,000 genetic diseases that could potentially be cured using gene therapy. Rare metabolic diseases, autoimmune disorders, cardiovascular disease and cancers are some of the top disease classes that can be addressed with gene therapies. With over 1,000...
Enhancing Biologics with CESI-MS Characterization
Comprehensive characterization of a biologic requires analysis at both the intact and digest levels, but these analyses can be complex and cumbersome. For example, with conventional liquid chromatography separations, researchers are often left with limited information...
Full, partial and empty capsid ratios for AAV analysis: What’s the big deal?
For many of you working to develop gene therapy drugs, you know that the time to market the drug is critical. Because gene therapeutics cure diseases by targeting specific genes, it is a constant race to see who develops the drug first. Unlike other classes of drugs where multiple medications can be used to treat a disease, whoever is first to develop a gene therapy drug wins.
Microflow LC-MS for oligonucleotides analysis
Oligonucleotides present their own unique challenges for characterization and quantification. They are uniquely susceptible to fairly high levels of synthetic impurities. Using the typical quantification method of ion-pairing reagents can be complicated. A simple way...
Accurate mass LC-MS/MS for PFAS analysis without needing a blockbuster budget
If you’ve been following our recent blogs, you’ve probably seen quite a bit on how per- and polyfluoroalkyl substances (PFAS) are shaking up both the food and environmental industry. Even if you’ve not been following our blogs, you’ve probably seen a lot of media...
A rising star in food allergen research: proteomics of shellfish allergen
It’s important to know what you’re eating, especially if you suffer from a food allergy.
About 220 million people worldwide live with a food allergy.1 These numbers, along with the complexity and severity of conditions, continue to rise. In America, there are about 32 million food allergy sufferers—5.6 million of those are children under the age of 18.2.2 That’s 1 out of every 13 children, or about 2 in every classroom. From a financial perspective, the cost of food allergy childcare for US families is up to $25 billion
NEW! SCIEX OS Software 1.7 streamlines intact protein quantification
Author: Vanaja Raguvaran Biopharmaceuticals are very diverse compounds. Their development is challenging and demands very flexible quantitative methods. There are different LC-MS/MS approaches to the bioanalysis of large protein-based molecules. A typical bottom-up...
What have we learned from the nitrosamine crisis?
The pharmaceutical industry is facing an ongoing issue with genotoxic impurities (GTIs). Over the past year, we have witnessed genotoxic impurities affect several drugs, including those used to treat elevated blood pressure, heartburn and acid reflux. Angiotensin II...
Routine cannabis screening is here. Will your lab reap the benefits?
Fast, accurate, and robust solution for routine commercial cannabis testing
As the world debates cannabis legalization for therapeutic applications and recreational use, the trends are shifting. Medicinal use of cannabis is legal in an increasing number of countries worldwide, including 33 states and the District of Columbia in the United States. Uruguay was the first country in the world to legalize the sale, cultivation, and distribution of cannabis in 2013. In the United States, Washington and Colorado were the first to fully legalize cannabis in 2012. By the end of 2019, 10 states have legalized recreational use for adults over the age of 21, with 64% of Americans favoring the move
Keep up with fentanyl and its analogs: Failure to do so is not an option.
Fentanyl is one of the most well-known synthetic opioids that has been in the spotlight lately—and not for good reasons. The World Drug Report 2019 reveals that there have been more than 47,000 opioid overdose deaths in the United States in 2017. This is an increase...
Hemp, marijuana, CBD and THC: what’s the difference?
Cannabis refers to a genus of flowering plants originating from Asia.1 It's also an umbrella term that includes both marijuana plants and hemp plants, among others. With the flurry of legalization across the United States, CBD and THC derived products have been thrown...
Environmental scientists: Why the SCIEX X500R QTOF system is perfect for PFAS research
The world of per- and polyfluoroalkyl substances (PFAS) research is a big one and one that’s currently front and center in environmental contamination concerns. Whether you work in industrial or academic environmental research, the issues surrounding these...
Mysterious Vaping Detectives Part 2
In our last blog, I gave you some current highlights about the mysterious vaping illness that was making headlines (and still is). The condition now known as, e-cigarette or vaping, product use-associated lung injury (EVALI) has sickened thousands and killed 57...
Trends shaping global environmental analytical testing
The only certainty in a changing environmental landscape Despite a 38-fold increase in environmental laws put in place around the world since 1972, the future of our planet is under the spotlight like never before. Mitigating climate change has arrived as our world's...
Mass spectrometry as a forensic science tool in 2020
There’s no doubt about it: forensics is at the front line of the criminal justice system. It’s where analytical chemistry has the power to fight crimes. It’s fascinating! But what excites me is how quickly things change and the speed of innovation. Just think about...
Microflow for metabolite ID: a win all around
Over the last several years there has been a slow and steady progression within the LC-MS community to move traditional high-flow applications to lower flow rates. In particular, moving into the microflow regime has proven to be a simple adjustment in methodology that...
A year of cannabis in Canada. Where are we and what’s next?
It’s been a momentous year for the cannabis industry in Canada. Not only did the country legalize cannabis with the Canadian cannabis law in October 2018, but it has also taken a giant leap in setting up a multi-billion dollar market from scratch. The progress made...
Take 5 with SCIEX Global Technical Marketing’s Pierre Negri
With the rise of Novel Psychoactive Substances (NPS), or designer drugs, in the past decade, forensic toxicologists are being tested like never before. It seems like as soon as one analog is identified, another is synthesized. These new chemicals share structures with...
When is a triple quadrupole not a triple quadrupole?
Answer: When it’s a QTRAP® In today’s modern and frenzied analytical laboratories, triple quadrupole mass spectrometers (MS) are the ‘workhorse,’ frontline instrument for carrying out quantitative assays from drug discovery to food safety. To get the best selectivity...
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