Below is an alphabetical list of gif images which are free for the taking. These images are handy for putting into tests, handouts or onto web pages. These gif files are transparent, so you might not want to use them on a dark background. Help yourself by first viewing and then "right clicking" on the image of interest and saving the .gif file to a directory on your computer. Good luck!

acetyl coenzyme A (acetyl CoA)
adenine
adenosine diphosphate
adenosine triphosphate
ADP
alanine
arginine
aspartic acid
asparagine
ATP
ATP (cpk stick image)
ATP (cpk space filling)
ATP (ionized)
bilayer (phospholipid)
ceramide
chlorophyll a
cholesterol (medium)
cholesterol (small)
choline
CoA-SH
cysteine
cytochalasin B
cytosine
dinitrophenol (2,4-dinitrophenol)
DNA (single stranded with base1, base 2....)
DNA (single stranded with A, G, C or T)
DNA (double stranded antiparallel)
Ethidium bromide (with name), (without name)
FAD
FADH2
fucose (L-fucose)
galactose (D-galactose)
glucose (D-glucose)
glucose (space filling)
glutamic acid
glutamine
glycine
guanine
histidine
hydroxyproline
isoleucine
lecithin
leucine
lipid bilayer
lysine
maltoporin (looking down on the membrane)
maltoporin (cross section)
mannose (D-mannose)
methionine
micelle
micelle (inverted)
N-acetyl-D-galactoseamine
N-acetyl-D-glucoseamine
N-acetylneuraminic acid
NAD
NADH
phenylalanine
phosphatidyl choline
phosphoric acid
phospholipid
phospholipid (cartoon)
photosystem II reaction center (view 1)
photosystem II reaction center (rotated 90 degrees)
plastoquinone
Proflavin (with name), (without name)
proline
RNA (with base 1, base 2....)
RNA (with A, G, C or U)
sialic acid
sphingomyelin
sphingosine
sphinogosine
threonine
thymine
tryptophan
tyrosine
uracil
valine