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If you use this service, could you please send us a mail to npsang@ibcp.fr with details about your usage of the NPSA service (tools used, frequency, type of sequence, ..) ? Could you explain what makes this service unique for you ? Could you please add information about your country and your laboratory ? Thanks

The amino-acid composition
It' a simple tool giving you the amino-acid composition of your protein, its mass (Da) and the theoretical molecular epsilon at 280 nm.

Availability in NPS@
This method is available :

• At URL : https://npsa-prabi.ibcp.fr/NPSA/npsa_compo.html.
• when you work with a sequence in NPS@.

Parameters
No parameter required.

NPS@ Amino-acid composition output example
You can see:

• The composition array.
• The protein mass.
• The theoretical molecular epsilon at 280 nm.

References