3d
activation
biochemistry
biology
cartoon
cd4
chain
chemistry
coil
color
computer generated
defense
dendritic cells
eosinophilic pneumonia
glycoprotein
graphic
green
helix
human
illustration
immune
innate immunity
macrophages
marker
medicine
membrane
model
molecule
monocytes
protein
receptor
ribbon
secondary
shape
sheet
strand
structure
t helper cells
tertiary
three dimensional
white background