1000 Da marker required

[RAMPITSCH at BCRSSU.AGR.CA]

Hi: just a quick question. I'm looking for MW markers
to calibrate a G-15 column; I've used polymyxin (1280 Da),
bacitracin (1400 Da) and bromo cresol green (700 Da). Something
in the 1000 Da range would be nice. We can't find any
bradykinin (1050 Da). Any ideas??
	BTW thanks to all of you who responded to the "small 
peptide blues query"; is there enough interest for me to make a 
summary and post it?
	
	Jeff