Table 1 Physico-chemical properties of three SG2NA isoforms

Accession number (from Uniprot)

B3STQ1

B2RQS1

Q9ERG2

Molecular formula

C₁₄₈₀H₂₃₂₅N₄₂₉O₄₅₄S₆

C₃₄₂₆H₅₃₃₉N₉₄₇O₁₀₈₁S₂₀

C₃₈₂₅H₅₉₉₅N₁₀₆₉O₁₂₁₆S₂₃

Molecular Weight

33584.7

77731.9

87150.4

p.I.

5.90

5.06

5.12

-R (negative residue)

44

100

117

+R (positive residue)

39

66

81

Extinction Coefficient

29910

89185

96300

Instability Index

60.06

46.00

45.19

Aliphatic Index

69.44

78.40

77.60

GRAVY

−0.869

−0.470

−0.532

S-S Bond

None

544, 546, 670

556, 613