One of the prefixes, stear(o)- is used in stearic acid. There is a paper on Nature that is related to stearic acid in 2015.
In this paper, the research team discovered that the activity of human transferrin receptor 1 (TFR1) can be affected by stearoylation. The stearoylated TFR1 cannot activate JNK protein so mitochondria will not become fragmented.
Because fragmented mitochondria is poorly functional, stearoylation is actually a good thing in this aspect.
What is stearic acid? Stearic acid is a long-chain fatty acid, with 18 carbons with no double bond. We usually express fatty acid as "C18:0", meaning this fatty acid has 18 carbons with no double bond. The structure of stearic acid can be seen in the picture below:
|Stearic acid. Source: wikipedia|
To make this story more interesting, the whole discovery was started on a mistake. So making mistakes isn't so bad sometimes, huh?
Teleman A.A. et. al., 2015. Regulation of mitochondrial morphology and function by stearoylation of TFR1. Nature. doi:10.1038/nature14601