Contaminants, as in the unintended proteinaceous parts of your sample, that, especially in mass spectrometry-based proteomics, are important to think about. This specific writeup is a series of twitter discussions with the real experts as I was analyzing data and led to a quest for contaminant lists, and finding out that these lists are actually being updated!

This is the official start of what could be termed a blog, that sometimes is long.

A deep dive into sources of fasta (for mass spec-based proteomics) and some recommendations