Amino Acid Molecular Weight Calculator
Calculate protein MW and composition from amino acid sequence
Protein Sequence
Valid: A, R, N, D, C, E, Q, G, H, I, L, K, M, F, P, S, T, W, Y, V
Amino Acid Composition
A(7)
G(4)
L(4)
K(4)
F(4)
T(4)
E(3)
H(3)
P(3)
S(3)
V(3)
D(2)
Molecular Weight
5.64 kDa
5644.39 Da
Sequence Properties
Length51 aa
Tryptophan (W)1
Tyrosine (Y)2
Cysteine (C)0
Extinction Coefficient (280nm)
ε (reduced Cys)8,480 M⁻¹cm⁻¹
ε (oxidized Cys)8,480 M⁻¹cm⁻¹
Abs 0.1% (reduced)1.502
Abs 0.1% (oxidized)1.502
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.