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. 2014 Aug 4;9(8):e104029. doi: 10.1371/journal.pone.0104029

Table 1. Extinction coefficients of Drosophila histones at 280 nm.

Molecular weight (Da)* ε280 (cm−1 M−1)#
H2A 13,232 4,470
H2B 13,565 7,450
H3 15,257 4,470
H4 11,250 5,960
Octamer 106,608 44,700

*Molecular weights do not include the initial methionine.

#

The extinction coefficients were calculated using the ProtParam tool with water as solvent (Swiss Institute of Bioinformatics; http://web.expasy.org/protparam/) [17].