
xMAP Technology General Guidelines
PN 89-00002-00-084 Rev. B 3
Handling
Instructions
xMAP Carboxylated Microspheres come in various configurations.
The handling of the product varies with the size of the container and
the fill volume. Avoid excessive agitation of the product to reduce
foaming and surface precipitation. The xMAP microspheres will
settle if left undisturbed. Always ensure that the xMAP microspheres
are homogeneously resuspended prior to dispensing. The uncoupled
xMAP microspheres are not monodispersed and tend to aggregate
until coated. Multiple pipetting from the original container may
affect bead concentrations. Protect the xMAP microspheres from
light at all times. Store xMAP microspheres at 2 to 8°C. Follow the
resuspension instructions based on the size of container in use:
• For 1 mL bottles: Remove from refrigeration and allow
equilibration to room temperature. Place on rotator and gently
rotate for 1-2 minutes or mix by gentle inversion immediately
prior to dispensing.
• For 4 mL and 16 mL bottles: Remove from refrigeration and
allow equilibration to room temperature. For new 4 mL and 16
mL bottles, place on a rotator for a minimum of 15 minutes for
complete resuspension. After using approximately 250 µL from
the bottle, you can reduce the rotator time to 1 to 2 minutes. For
these volumes, vortexing and rocking are not recommended.
Bead Selection Select beads from the standard 100-region bead map. Refer to
Table 1. You should select beads starting from the upper left, reading
across to the end of a row, and then down to the next row:
Bead Concentration The concentration of beads in an assay determines system speed. To
analyze a 96-well plate in one hour, use at least 5000 beads per target
Note: Refer to the product
information sheet that
accompanies your xMAP
microspheres for additional
information.
Table 1: 100-Region Bead Selection
033 034 035 036 037 038 042 043 044 045
046 047 051 052 053 054 055 056 061 062
063 064 065 066 072 073 074 075 076 077
017 018 019 020 021 024 025 026 027 028
029 032 041 011 012 013 014 006 007 008
083 084 085 086 087 088 089 090 048 057
058 067 068 069 078 079 080 002 003 004
009 015 022 030 039 049 050 059 060 070
071 081 082 001 005 010 016 023 031 040
091 092 093 094 095 096 097 098 099 100
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