Hi! I have samples sequenced with NextSeq for the experiment protocol setup. We tested different kits (Nextera, Kapa, Qiagen) and apart from the donor samples, we sequenced ATCC bacterial mix with the addition of human cells, as well as ATCC genomic DNA. What I observe in QC reports is first of all, per base sequence content bias, but also disturbing GC content distributions for ATCC samples (yellow ones are the bacterial mix, the red one is genomic DNA). Would that suggest contamination or some other issue, or could it be a characteristic of those samples?
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Proteins are often described as the workhorses of the cell, and identifying their sequences is key to understanding their role in biological processes and disease. Currently, the most common technique used to determine protein sequences is mass spectrometry. While still a valuable tool, mass spectrometry faces several limitations and requires a highly experienced scientist familiar with the equipment to operate it. Additionally, other proteomic methods, like affinity assays, are constrained...-
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Despite advancements in sequencing platforms and related sample preparation technologies, certain sample types continue to present significant challenges that can compromise sequencing results. Pedro Echave, Senior Manager of the Global Business Segment at Revvity, explained that the success of a sequencing experiment ultimately depends on the amount and integrity of the nucleic acid template (RNA or DNA) obtained from a sample. “The better the quality of the nucleic acid isolated...-
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