violet = nuclear · slate = cytosolic · teal = membrane / surface · amber = secreted · the cell’s real defining proteins (Human Protein Atlas single-cell markers) each in its real compartment · cyan = activated / red = suppressed

structures: nucleus · nucleolus · mitochondria · rough ER / smooth ER · Golgi · lysosomes · peroxisomes · endosomes · lipid droplets · centrosome + microtubules · actin cortex · intermediate filaments · glycocalyx · primary cilium

cell-cell signaling: amber = secreted ligands (released into the extracellular space) · teal = surface receptors (how this cell talks to its neighbors) · toggle with “signals”

labels: landmark structures always named; finer ones appear as you zoom in (toggle with “labels”). hover the interior to name any resting protein. every human cell type drawn at its real morphology.