Chemistry A-Level
sequence and direction
What sequence and direction means in Chemistry A-Level, as defined for AQA.
Definition of sequence and direction
Check what you remember
Read the wording for your board, then hide it and explain sequence and direction in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Order matters, because glycine joined to alanine is a different dipeptide from alanine joined to glycine as the peptide link points the other way.
Topics that use sequence and direction
- Proteins (A-level only) (AQA A-Level)
Related terms
- building peptides
- comparison with standards
- condensation
- hydrogen bonding
- hydrolysis of the peptide link
- hydrolysis products
- identifying protein structure
- mobile phase
Using sequence and direction in the exam
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