the ratio of acetylcarnitine/carnitine was 1.77 +/- 0.69 in extracts of sperm from samples with a low degree of motility ( 0-10 % motile ) , whereas it was 4.70 +/- 1.58 in samples which were 40-80 % motile .
C0001040
acetylcarnitine
C0007258
carnitine