Fischer
projection:
A method of representing molecular
structure, often for an acycliccarbohydrate.
The meeting of two perpendicular lines indicates a stereocenter.
Vertical lines at the stereocenter
indicate groups
that are pointing away from the viewer, as if on a dashed
wedge. Horizontal lines indicate groups
that are pointing towards the viewer, as if on a solid
wedge. If the molecule
represented by the Fischer projection is a carbohydrate, the
projection is frequently drawn so the the carbonyl
is as close to the top of the drawing as possible.
