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Example sentences for: sperm
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The most common sequences were derived from genes that are known to be highly expressed in the testis in other organisms and include heat shock protein 90A [ 20 ] , chitobiase [ 21 ] , outer dense fiber of sperm tails [ 22 ] and kinectin [ 23 ] . Therefore, the majority of sequences were represented only once or at most two times in the data set.
They start chanting into a megaphone behind me: "If you can't find the sperm, let the worm finish his term!"
This localization is quite different from that reported for ejaculated human sperm where SPAM1 is found uniformly over the entire head surface [ 39 ] . Our finding suggests that SPAM1 undergoes redistribution on the sperm head during epididymal maturation in primates as it does in guinea pigs and mice [ 40 10 ] , albeit with a reverse order going from a regionalized to uniform pattern.
The results from Western analysis of protein extracts from the epididymis, which like the vas deferens were thoroughly washed to remove sperm, show conclusively that intact SPAM1 protein is synthesized in all three epididymal regions in macaques.
For this reason, it was thought worthwhile to investigate the presence of SPAM1 in the human epididymis and vas deferens for which a possible role in sperm maturation has been proposed [ 14 ] . Because of the difficulty in obtaining fresh human tissue we included in our study tissues of cynomolgus macaque which is a primate model for studying human sperm maturation [ 15 ] .
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