User guide

Branched biopolymers
Residue labels typically have two attachment points. However, you can add attachment points so that the sequence
branches. For example:
When you add an attachment point, you specify the atom in the expanded label to which the bond will attach.
To bond from a sequence:
1. Draw a bond starting at the label from which to create a branch. The Modify Nickname dialog box appears, dis-
playing the sequence structure you selected.
2. In the Modify Nickname dialog box, double-click the atom in the structure on which you want to add the attachment
point. A new attachment point appears.
3. Click OK.
IUPAC codes
Use these codes to enter nucleotides or amino acids in your sequence:
IUPAC nucle-
otide code
Base IUPAC amino
acid code
Three
letter code
Amino acid
A Adenine A Ala Alanine
ChemBioDraw 13.0
Chapter 5: Drawing biopolymers 70 of 401