Date published: 2026-4-28

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S-Aminoethyl-L-cysteine hydrochloride (CAS 4099-35-8)

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Alternate Names:
L-Cys(aminoethyl)-OH⋅HCl; L-4-Thialysine hydrochloride
CAS Number:
4099-35-8
Molecular Weight:
200.70
Molecular Formula:
C5H12N2O2S•HCl
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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S-Aminoethyl-L-cysteine hydrochloride, a cysteine derivative, serves a pivotal role in protein synthesis by substituting lysine in the formation of proteins. As a lysine analogue, it enables comparative analysis alongside other lysine analogues. Moreover, this compound acts as an alternative substrate, particularly valuable for characterizing lysine cyclodeaminase sourced from Streptomyces pristinaespiralis. By incorporating S-Aminoethyl-L-cysteine hydrochloride, researchers can explore the enzymatic properties and functions of lysine cyclodeaminase.


S-Aminoethyl-L-cysteine hydrochloride (CAS 4099-35-8) References

  1. Precolumn derivatization reagents for high-speed analysis of amines and amino acids in biological fluid using liquid chromatography/electrospray ionization tandem mass spectrometry.  |  Shimbo, K., et al. 2009. Rapid Commun Mass Spectrom. 23: 1483-92. PMID: 19350529
  2. Network Analysis Reveals the Molecular Bases of Statin Pleiotropy That Vary with Genetic Background.  |  Del Rio Hernandez, CE., et al. 2023. Microbiol Spectr. 11: e0414822. PMID: 36946734

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

S-Aminoethyl-L-cysteine hydrochloride, 250 mg

sc-479087
250 mg
$62.00

S-Aminoethyl-L-cysteine hydrochloride, 1 g

sc-479087A
1 g
$198.00

S-Aminoethyl-L-cysteine hydrochloride, 5 g

sc-479087B
5 g
$666.00