I've noticed that in mammalian cell culture, there are often two types of DMEM available. High Glucose and Low Glucose. Does it matter which type I use for culturing of cells (e.g. Hela or HEK293)? Which is the type people normally use?
We typically use High Glucose as cells grow faster. One caveat is that there are concerns that certain protein modifications (specifically OGlnAc-ylation) may be upregulated in non-physiological (25mM or high glucose) media.