The results of agglutination and
agglutination-inhibition experiments with
two sponge extracts (Axinella sp. and Cliona
celata) and three snail extracts (Achatina
granulata, Theba pisana and Helicella virgola,
banded form) are reported.
The extracts which show D-galactose specificity and are also inhibited by sugars
related to D-galactose or containing it, have been subdivided into 1. a subgroup
with no blood group specificity to which belong Axinella sp., Cliona celata and Ricinus
communis extract and 2. another subgroup with B-like specificity to which belong
extracts of Helicella virgata (banded form), Bandeiraea simplicifolia and Fomes
fomentarius extracts.
Extracts of subgroup 1. but not of subgroup 2. are inhibited by Pn XIV polysaccharide.
In spite of anti-B-like specificity, extracts belonging to subgroup 2. are
just as well or even better inhibited by NAcgal than by D-galactose.
The extracts of Achatina granulata and Theba pisana lack D-galactose specificity.
Achatina granulata extract was inhibited by NAcgal, NAcglu and NANA; Theba
pisana extract only by NANA.
Theba pisana extract agglutinated only neuraminidase-treated red cells, Helicella
virgata (banded form) extract only enzyme-treated B cells.
inhibited by NAcgal, NAcglu and NANA; Theba
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