ml138ML138 is a probe for MLPCN, an agonist of the κ opioid receptor. Popular Searches. Cell Counting Kit-8 (CCK-8) Approved Drug Library MG-132 Ferrostatin-1 Z-VAD-FMK. mole. 1Types of bolts and nuts : ML138 ML462; Quantity : 4; Features. Brand FSA; Made in France No; Reference 161582; EAN13 4710243884294; Manufacturer reference 390-0054000151;