L-DOPA can be used for melanogenesis by S. schenckii. (A) S. schenckii strain IPEC 23252 on minimal medium (MM), minimal medium with tricyclazole (MMT), minimal medium with L-DOPA (MML) and minimal medium with L-DOPA and tricyclazole (MMLT). (B) PAGE of native S. schenckii mycelial antigens (1 to 4) showing a dark band compatible with L-DOPA polymerization, when antigens are boiled (5 to 8) this band disappears. 1 and 5: ATCC 10212, 2 and 6: IPEC 23252, 3 and 7: IPEC 22582, 4 and 8: IPEC 26449. Yeast antigens of the same strains produced a similar reaction.