we conclude that ( 1 ) the number of spermatozoa with nuclei that are insufficiently stabilized by disulphide bonds is much higher in the semen of fertile men than was previously thought , ( 2 ) significant differences exist among fertile men in the proportions of ejaculated spermatozoa extensively stabilized by disulphide bonds , and ( 3 ) removal of seminal plasma and/or cellular contaminants ( zinc ) is necessary to unveil the instability of the nuclear chromatin in the ejaculated spermatozoa of fertile men .
C0007610
nuclei
C0007634
cellular