Which fluorochromes can I use for labeling my analyte? A Which fluorochromes can I use for labeling my analyte? The heliXcyto has a green and a red detection channel. You can use any low-bleaching fluorochrome with an excitation wavelength in the range of 490-510 nm or 605-625 nm and an emission wavelength in the range of 525-575 and 655-685 nm, respectively. Category: Experimental Considerations