GENE DATABASE
  expression/subcellular localisation  
 
optional
DNA type protein category location
expression
expression 
spatial expression
system organ step 1 organ step 2 organ step 3 expression level
organ 
system tissue step 1 tissue step 2 tissue step 3 tissue step 4
tissue 
system cell step 1
cell 
spatial expression
cell lineage  fluid  cell lines 
temporal expression
life period 
cell cycle or cell life 

imprinted
imprinted 

extra or subcellular localization
extracellular 
intracellular 
plasma membrane