Sentence examples for both chromogens were from from inspiring English sources

Both chromogens were from Biocare Medical.

Calcein AM, Dulbecco's modified Eagle's medium (DMEM), EpiLife medium, ethylenediamine tetraacetic acid (EDTA), fetal bovine serum (FBS), HEPES, non-essential amino acids, penicillin/streptomycin/L-glutamine solution, RPMI-1640 without L-glutamine, sodium bicarbonate, and tetramethyl benzidine chromogen (TMB) single solution chromogen were from Invitrogen (Carlsbad, CA).

The secondary antibody and substrate chromogen were provided from the EnVision® System kit (K4009, Dako).

The HPLC approach for determining creatinine concentration and separation of creatinine from interfering chromogens is shown in Figure 2A C.

Both were from Nebraska.

AEC substrate-chromogen was purchased from Dako and cocktail protease and phosphatase solutions for protein harvest from Roche (protease inhibitor cocktail tablets –complete mini- # 836153001), Sigma (phosphatase inhibitor cocktail 2 # P5726-5 ml) and Calbiochem (phosphatase inhibitor cocktail IV # 524628).

DAB substrate-chromogen was purchased from Dako (K3468, Burlington, ON, CA).

Appropriate secondary antibodies were from Dako and DAB chromogen was used for visualisation.

Biotinylated secondary antibodies and HRP-conjugated streptavidin were from Vector (UK) and the chromogen substrate DAB from Sigma (UK).

Both are from Zara.

(Both are from Oberlin).