Changes of serological activity by alpha-L-fucosidase isolated from Streptococcus sanguis ATCC 10557

alpha-L-Fucosidase isolated from the growth culture of Streptococcus sanguis ATCC 10557 acted on H- and Leb-blood group substances in porcine gastric lining, human gastric lining, human ovarian cyst fluid and human whole saliva, with consequent loss of H- and Leb -activities and a concomitant increase of Lea activity.