Question

Beta ( β ) sheets are a type of secondary structure in proteins. A segment of a single chain in an antiparallel β sheet has a length of 193 Å . How many residues are in this segment?

Answer 1

Answer: 55 residues

Step-by-step explanation:

We are given that length of sheet= 193 Å

We need to find out the number of residues in this segment.

Now in an anti parallel  β sheet, the repeat comes out after every 7Å.

In every repeat, there are 2 residues.

So, to find out the number of residues in segment, we multiply the number of segments with the residues in every segment.

Residues in segment= $\frac{193}{7}*2$

Residues in segment= 55.14

Or 55 residues.