TABLE 1.

Retention times and proposed assignments of siderophores in culture filtrates from H. capsulatum

Culture vol	Fungal strain	Observed ion (m/z)	Proposed assignmenta	Expected ion (m/z)	Chromatography retention times (min) in:
					Bio-Gelb	Reverse-phase-C18c	Size exclusionc
Large	505, G184A-R, and G184A-S	538.2d	Dimerum acid	538.2	220–300	28–28.3 (4)	31.0–33.6 (3)
Small	505	316.5	Fusarinine (monomeric)	316.5	200–300	3.8	15.2
	505	538.2	Dimerum acid	538.2	220–300	27.9	27.2
	505	580.2	Acetyldimerum acide	580.2	200–290	35.2	Not done
	505	780.3	Coprogen Be	780.3	220–245	35.9	19.15
	505	794.4	Methyl coprogen B	794.4	200–240	37.1–37.5 (2)	19.3–19.5 (2)

^aAll in the ferrated state. 

^bA range of retention times is given for the Bio-Gel peaks because they are broad, and the indicated range represents the region that was pooled for the next chromatographic step. 

^cData are presented as the range of retention times recorded on different days with different preparations (number of different experiments) or as the retention time observed on a single chromatogram. 

^dThis component comprised the bulk of the second peak of 480-nm absorption eluting from the Bio-Gel P2 column and was present as the predominant component in all filtrates examined. 

^eTentative assignment.