There is a paragraph titled "MHC Proteins Are the Most Polymorphic Human Proteins Known" in the "Molecular Biology of the Cell" by Alberts et al. 6th ed. 2014.
But someone has recently told me that it is not the case making an example of a set of genes helping to identify persons in forensic medicine. (I didn't remember the genes.) Is it true?
Are MHC proteins the most polymorphic human proteins known?