biochem 5 - rayan99

[ArchivalUser]

A 50 year-old man with a rare recessive condition is at high risk for deep vein thrombosis and stroke and replacement of ectopic lenses.His Hct normal and no anemia.A mutation in the gene encoding which of the following is most likely to cause this disease?
a.cystathione synthase
b.homocysteine methyl transferase
c.lysyl oxidase
d.fibrillin.
e.Branched chain alpha keto gluterate.

[ArchivalUser]

AA .

[ArchivalUser]

aaa

[ArchivalUser]

aa

[ArchivalUser]

a..incresed homocystine

[ArchivalUser]

yep ans is aa
its from kap book.but the explanation is confusing to me,why not b is the answer.can anyone make me clear ?thanks.

[ArchivalUser]

because the other enzyme involves vit b12 and folic acid as well and patient in question has no anemia and normal hct.