The macro molecular structure of human cervical mucus glyco proteins fragments obtained after reduction of di sulfide bridges and after subsequent trypsin ec 3.4.21.4 digestion Carlstedt, I.; Lindgren, H.; Sheehan, J.K. Biochemical Journal 213(2): 427-436 1983 0264-6021 https://eurekamag.com/research/006/712/006712729.php