ProtParam
ProtParam [Documentation / Reference]
is a tool which allows the computation of various physical and chemical parameters for a given protein stored in
UniProtKB or for a user entered protein sequence.
The computed parameters include the molecular weight, theoretical pI, amino acid composition, atomic composition, extinction coefficient, estimated half-life, instability index, aliphatic index and grand average of hydropathicity (GRAVY)
(Disclaimer).