Constrained De Novo Sequencing of Peptides with Application to Conotoxins. - Swapnil Bhatia; Yong J. Kil; Beatrix Ueberheide; Brian T. Chait; Lemmuel Lara Tayo; Lourdes J. Cruz; Bingwen Lu; John R. Yates III; Marshall W. Bern (RECOMB, 2011)