L-4-Oxalysine hydrochloride has shown antitumor activities, is a natural product isolated from the culture media of Streptomyces roseovirdofuscus in China.
Tubulysin D is a tetrapeptide isolated from the myxobacterial species Archangium geophyra and Angiococcus disciformis, and displays potent antitumor activity.
Tubulysin B is an agent of potent microtubule destabilizing and highly cytotoxic peptide isolated from the myxobacteria Archangium geophyra and Angiococcus disciformis.
Tubulysin C is a natural product isolated from the myxobacterial species Archangium geophyra and Angiococcus disciformis, and is a highly cytotoxic peptide.
Tubulysin E is a natural product isolated from the myxobacterial species Archangium geophyra and Angiococcus disciformis, and is a highly cytotoxic peptide.