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2-Mercaptoethanol (2-ME) has been used in ESC culture media since the first derivation; C- U1 w' c& z; B% E
of mouse ESCs in 1981. Originally included as a reducing agent because of concern
; X# `1 [% {% e4 p; W. s+ b0 D$ Nabout oxidation of culture components, it continues to be used in hESC media.+ S/ V& |9 |% @& K$ Y
Since the final concentration is 0.1 mM, and the pure solutions of 2-ME are 14.3 M,
$ f% r3 V- g vit is necessary to start with a stock solution.
! k5 I9 ~ K% j# x3 _3 P( @Several companies sell diluted solutions of 2-ME; the 55 mM solution in PBS; y3 G/ P) h! D0 T8 J7 |/ |
(Invitrogen catalog no. 21985-023) is a convenient concentration for a stock.
2 l6 F9 U5 z6 l1 L1 O7 J4 TIf you wish to make your own stock, we suggest that you make a 1000 stock from
4 y! Z' ?- p! i7 t- m0 I8 F# T3 Ithe generally available concentrated solution (14.3 M).
. T7 |& l0 f: u( Z4 M+ [; T3 E7 kFor 1000 stock: dilute 35 μL of 14.3 M 2-ME (Sigma catalog no. M7522) into
/ v# h2 k1 v, [$ \. V5 N$ x; s5 mL of PBS to make a 0.1 M stock solution. Filter before use. |
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