This product is discontinued at Covance (documented 4/21/2016) and the same as AB_2313773, but was at one point sold in the 250uL quantity; and it is currently offered by BioLegend under the catalog numbers: 801201 and 801202 Consolidated with AB_10063408 on 09/21/16
Covance Research Products Inc
MMS-435P also MMS-435P-250
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