@article {fygenson2004variability,
	title = {Variability-based sequence alignment identifies residues responsible for functional differences in $\alpha$ and $\beta$ tubulin},
	journal = {Protein science},
	volume = {13},
	year = {2004},
	pages = {25{\textendash}31},
	publisher = {Wiley Online Library},
	author = {Fygenson, D Kuchnir and Needleman, Daniel J and Sneppen, Kim}
}
