How Is Le^b Substance Formed

question 63

Multiple Choice

How is Le^b substance formed?

• A) L-fucose is added to subterminal N-acetylglucosamine of type 1 H substance.
• B) L-fucose is added to subterminal N-acetylglucosamine of type 2 H substance.
• C) Le^a and Le^b are codominant alleles located on chromosome 19.
• D) Le^b is secreted into plasma in the absence of fucosyltransferase.

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