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Peptides

Flag peptide

Also known as Dykddddk peptide, Trypsinogen (human pancreas isoenzyme 2 activation peptide), 1-L-aspartic acid-2-L-tyrosine-3-L-lysine-, FLAG tag Peptide

CAS 98849-88-8Formula C41H60N10O20Molar mass 1,012.98 g/mol
5 suppliers listed
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Flag peptide chemical structure, C41H60N10O20, CAS 98849-88-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
98849-88-8
Formula
C41H60N10O20
Molar mass
1,012.98 g/mol
HS code
292429
Category
Peptides

What is Flag peptide?

Plain description, key identifiers and synonyms

FLAG peptide is an eight amino acid peptide consisting of L-aspartic acid, L-tyrosine, L-lysine, four L-aspartic acid residues, and L-lysine joined in sequence by peptide linkages. It is widely used as a fusion tag for the purification and detection of a wide variety of recombinant proteins.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2S)-6-amino-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-6-amino-2-[[(2S)-2-[[(2S)-2-amino-3-carboxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoyl]amino]-3-carboxypropanoyl]amino]-3-carboxypropanoyl]amino]-3-carboxypropanoyl]amino]-3-carboxypropanoyl]amino]hexanoic acid
CAS number
98849-88-8
Molecular formula
C41H60N10O20
MDL number
MFCD02262135
InChIKey
XZWYTXMRWQJBGX-VXBMVYAYSA-N
InChI
InChI=1S/C41H60N10O20/c42-11-3-1-5-22(45-36(65)24(13-19-7-9-20(52)10-8-19)47-34(63)21(44)14-29(53)54)35(64)48-26(16-31(57)58)38(67)50-28(18-33(61)62)40(69)51-27(17-32(59)60)39(68)49-25(15-30(55)56)37(66)46-23(41(70)71)6-2-4-12-43/h7-10,21-28,52H,1-6,11-18,42-44H2,(H,45,65)(H,46,66)(H,47,63)(H,48,64)(H,49,68)(H,50,67)(H,51,69)(H,53,54)(H,55,56)(H,57,58)(H,59,60)(H,61,62)(H,70,71)/t21-,22-,23-,24-,25-,26-,27-,28-/m0/s1
Canonical SMILES
NCCCCC(NC(=O)C(CC(=O)O)NC(=O)C(CC(=O)O)NC(=O)C(CC(=O)O)NC(=O)C(CC(=O)O)NC(=O)C(CCCCN)NC(=O)C(Cc1ccc(O)cc1)NC(=O)C(N)CC(=O)O)C(=O)O
Isomeric SMILES
C1=CC(=CC=C1C[C@@H](C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(=O)O)C(=O)N[C@@H](CC(=O)O)C(=O)N[C@@H](CC(=O)O)C(=O)N[C@@H](CC(=O)O)C(=O)N[C@@H](CCCCN)C(=O)O)NC(=O)[C@H](CC(=O)O)N)O

Synonyms

  • Dykddddk peptide
  • Trypsinogen (human pancreas isoenzyme 2 activation peptide), 1-L-aspartic acid-2-L-tyrosine-3-L-lysine-
  • FLAG tag Peptide
  • Asp-Tyr-Lys-Asp-Asp-Asp-Asp-Lys
  • FLAG Epitope Peptide
  • Dykddddk
  • FLAG(TM) peptide
  • FLAG Peptide TFA salt
  • D-Y-K-D-D-D-D-K
  • FLAG(R) Peptide, lyophilized powder
  • H-Asp-Tyr-Lys-Asp-Asp-Asp-Asp-Lys-OH
  • L-Asp-L-Tyr-L-Lys-L-Asp-L-Asp-L-Asp-L-Asp-L-Lys
  • L-alpha-aspartyl-L-tyrosyl-L-lysyl-L-alpha-aspartyl-L-alpha-aspartyl-L-alpha-aspartyl-L-alpha-aspartyl-L-lysine

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
1,012.98 g/molcalc.
Exact mass
1,012.3985 Dacalc.
LogP (octanol/water)
-5.63calc.
Topological polar surface area
525.8 Ųcalc.
Hydrogen bond donors
17calc.
Hydrogen bond acceptors
17calc.
Rotatable bonds
35calc.
Heavy atoms
71calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.54calc.
Formal charge
0calc.
Stereocentres
8calc.
Lipinski rule of five
Fails (3 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Flag peptide suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 5 suppliers
5 of 5 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

5 suppliers in 3 countries

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Flag peptide price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Flag peptide is traded under.

HS 2924.29Indicative HS code

Cyclic amides (including cyclic carbamates) and their derivatives, salts thereof, other

World exports in 2024
$5.69B
−5.1% vs 2023, imports $5.8B
2019 to 2024
Top exporters
  1. China32.3%
  2. Switzerland * partner reported13.6%
  3. Norway * partner reported12.8%
Top importers
  1. United States15.9%
  2. Ireland15.8%
  3. Germany11.9%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Flag peptide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Flag peptide, based on the data on this page

What is Flag peptide?

FLAG peptide is an eight amino acid peptide consisting of L-aspartic acid, L-tyrosine, L-lysine, four L-aspartic acid residues, and L-lysine joined in sequence by peptide linkages. It is widely used as a fusion tag for the purification and detection of a wide variety of recombinant proteins.

What is the CAS number of Flag peptide?

The CAS registry number of Flag peptide is 98849-88-8.

What is the molecular formula and weight of Flag peptide?

The molecular formula of Flag peptide is C41H60N10O20 and its molar mass is 1,012.98 g/mol.

Is Flag peptide hazardous?

No GHS hazard classification for Flag peptide is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Flag peptide?

Flag peptide is usually classified under HS code 292429 (Cyclic amides (including cyclic carbamates) and their derivatives, salts thereof, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Flag peptide?

CompoundList lists 5 suppliers of Flag peptide in United States, China and France. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Flag peptide?

Suppliers quote Flag peptide on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Flag peptide

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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