| Pixel | picture element |
|---|---|
| PRKAR | protein kinase, cyclic adenosine monophosphate-dependent, regulatory |
| PRKAR1A | protein kinase, cyclic adenosine monophosphate-dependent, regulatory, type 1 alpha |
| REE | rapid extinction effect; rare earth element; resting energy expenditure |
| SRE | Schedule of Recent Experiences; sterol regulatory element |