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Abstract
The presence of lipoteichoic acid (LTA) in plasma membrane and released adenosine triphosphatase (ATPase) preparations of Streptococcus lactis subsp. cremoris HA was studied by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE). The membrane preparation gave two spots with periodic acid Schiff's (PAS) staining. The reference LTA revealed one CBB stainable band with MW 21 500, and was detected as a characteristic yellow spot in the molecular weight area 14 000–20 900 with silver staining and was also stainable with PAS. A slight colour was found with PAS in the F1-ATPase (EC 3.6.1.3) preparation. The results suggest that the carbohydrate component in the membrane preparation and in the solubilized F1-ATPase is LTA.
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