11. Protein sequence can be used to biophysical properties, such as its isoelectric point . 12. Separation of the proteins by isoelectric point is called isoelectric focusing ( IEF ). 13. At all pH values other than their isoelectric point , proteins will be charged. 14. Lactoferrin belongs to the basic proteins, its isoelectric point is 8.7. 15. A number of algorithms for estimating isoelectric points of peptides and proteins have been developed. 16. The viscoelasticity of protein foam films is usually at its highest near its isoelectric point . 17. Pectinesterases can however display acidic isoelectric points as detected in soluble fractions of plant tissues. 18. The calculated theoretical pI ( isoelectric point ) of this protein is 4.69. 19. Phosphophoryn is the most acidic protein ever discovered and has an isoelectric point of 1. 20. The molecular weight is 40.0 kdal and the isoelectric point is 4.383
