Glucose....

[Cheman]

Condensation reactions occur between the OH and H of C 1,4 and 6 to form polysaccharides - why do we not get reaction at C 2 or 3? ( 5 is obvious since it is not attached to H or OH )

Thanks. :smile:

[Cheman]

What I mean is, why do we only get the end OH and H's reacting (eg - in the case of amolase in starch) or the ones on the C chain not in the ring ( as the case with glycogen) not the others?

Thanks.

[Astronuc]

Cheman,

These sites might shed some light on the subject.

http://www.biotopics.co.uk/as/glucose2.html

http://www.bmb.psu.edu/courses/bmb401_spring2003/carbohydrates_2.pdf

http://www.biologie.uni-hamburg.de/b-online/e16/16h.htm

The pdf file discusses glycosidic bonds and looks useful.