Alanine is one of the standard amino acids that make up proteins, and it also occurs on its own, unattached, in foods, fermentation samples, and cell culture media. A lab reports alanine as part of a wider amino acid profile, not in isolation. One naming point matters before anything else on a report: AABA, short for alpha-aminobutyric acid, is the internal standard the lab adds to help quantify the results. AABA is not alanine and is not a result for your sample. Confusing the two is an easy alanine reading error, and this page states the distinction plainly to prevent it.
Chemistry in plain terms
Standard biochemistry references classify alanine as a non-essential amino acid for humans, meaning the body can make it rather than needing to obtain all of it from food. Its structure is simple by amino acid standards: the usual amino and carboxylic acid groups, plus a small methyl side chain. PubChem lists alanine, in its L-form, as a standard proteinogenic amino acid, built into protein chains as well as present free in solution. Both forms of presence, bound and free, are real, and they answer different questions.
A second naming trap: beta-alanine, an ingredient in some supplement products, is a different compound from the alanine, meaning L-alpha-alanine, measured here. If your product lists beta-alanine, ask before ordering whether the panel measures the compound you mean.
Where it occurs
Alanine occurs as a building block in proteins across foods, feeds, and biological materials. Free alanine also occurs in cell culture and spent media, fermentation and process liquids, protein hydrolysates, and food and supplement products, where a free profile describes the sample as it is.
This page gives no typical level for alanine in any material. Levels vary with recipe, organism, process, and sampling point, and no verified figure is available. Measure your sample rather than borrowing a number from a different one.
Free vs total for alanine
A free alanine result measures the alanine already dissolved and unattached in the sample as received, with no hydrolysis step. That is usually the relevant number when the question is about the sample as used or as eaten: what is in the medium now, or what free profile a product presents.
A total alanine result is measured after acid hydrolysis, the step in total amino acid analysis that breaks protein chains apart and releases bound amino acids. A total result therefore includes free alanine plus alanine that was bound inside protein. This page gives no ratio between free and total for any material, because that ratio is a property of the specific sample.
Alanine has no special hydrolysis conversion of the kind that affects asparagine and glutamine, whose amide groups are lost during acid hydrolysis and which are therefore reported together with aspartic acid and glutamic acid respectively. The general total-panel caution still applies: a hydrolysed measurement describes the sample after the method has acted on it, not a photograph of its native state.
Method notes: how alanine is measured here
At OpenChemWorks, alanine is measured as part of a panel using AQC pre-column derivatization, the Waters AccQ-Tag approach, with HPLC-UV detection. The amino acids are chemically tagged, separated on the HPLC column, and quantified against calibrated standards. AABA is added at a known amount as the internal standard, which is why its name appears in method paperwork. To restate the must-know point: AABA is the standard, added by the lab; alanine is the analyte, measured from your sample. Different compounds, different roles.
No resolution, recovery, or detection-limit figure is quoted here, because no verified figure from this laboratory's validated method is available.
Which panel includes alanine
Alanine is included in AA-1, the free amino acid panel: 19 amino acids plus ammonia, measured by AQC HPLC-UV. Cysteine is excluded from AA-1 and needs a separate AA-3 workup. Alanine is also part of a total result under AA-T, where the sample is hydrolysed first and alanine is reported on that total basis.
Prices are only these: AA-1 costs $150 per sample for liquids, $180 per sample for powders ($150 plus $30 powder preparation), and $150 flat for first-time customers, with $125 per sample at 25 or more samples per month. AA-T, total amino acid analysis, costs $230 per sample. The pilot is $250 for 5 samples, credited in full against a first contract signed within 90 days.
OpenChemWorks, in Davis, California, is validating now and reserving pilot slots. The lab is not GLP, GMP, or ISO/IEC 17025 accredited, and no turnaround is promised here. Email info@openchemworks.com with your sample description and whether your question is about the sample as it is, or its protein as a whole.
Frequently asked questions
Is AABA the same as alanine?
No. AABA, alpha-aminobutyric acid, is the internal standard added by the lab for quantification. Alanine is a different compound, and it is the analyte measured from your sample.
Is panel alanine the same as beta-alanine in a supplement?
No. The panel measures L-alpha-alanine. Beta-alanine is a different compound. Ask before ordering if beta-alanine is what you need.
Do I need free or total alanine?
Free answers a question about the sample as received. Total answers a question about protein composition after hydrolysis, and includes the free fraction.
Is alanine reported on its own?
At OpenChemWorks it is reported as part of the AA-1 free panel or the AA-T total panel, alongside the other panel analytes.
References
- Waters — Derivatization of Amino Acids Using Waters AccQ-Tag Chemistry — Method background for AQC derivatization and HPLC-UV amino acid analysis.
- British Journal of Nutrition (2023) — Asparagine and glutamine lose an amide residue during acid hydrolysis and are measured with aspartate and glutamate respectively.
- OpenChemWorks — Pricing — Published service and pricing copy (2026).
OpenChemWorks Laboratory · Reviewed by the laboratory director, PhD chemist · Published October 26, 2026