Schracke N, Linne U, Mahlert C, Marahiel MA (2005)
Synthesis of linear gramicidin requires the cooperation of two independent reductases
Biochemistry 44: 8507

Kessler N, Schuhmann H, Morneweg S, Linne U, Marahiel MA (2004)
The linear pentadecapeptide gramicidin is assembled by four multimodular nonribosomal peptide synthetases that comprise 16 modules with 56 catalytic domains
Journal of Biological Chemistry 279: 7413