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LIFE01200604005 Shri Somnath Ghosh - Homi Bhabha National ...

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CHAPTER 2<br />

MATERIALS AND METHODS<br />

2.1 Chemicals<br />

Ammonium persulphate (APS), sucrose, 4-(2-hydroxyethyl)-1-<br />

piperazineethanesulfonicacid (HEPES), ethylene (oxyethylenenitrilo) tetraacetic acid (EGTA),<br />

phenylmethylsulphonyl fluoride (PMSF), aprotinin, leupeptin, pepstatin,<br />

ethylenediaminetetraaceticacid (EDTA), β-mercaptoethanol, Triton X-100, dithiothreitol (DTT),<br />

dimethy sulphoxide (DMSO), Acrylamide, N, N’-methylenebisacrylamide, Sodium dodecyl<br />

sulfate (SDS), Trizma base, N, N,N’N’-tetramethylethylenediamine (TEMED), Glycine,<br />

ponceau S and coomassie brilliant blue, bromophenol blue, paraformaldehyde,<br />

Polyoxyethylenesorbitan monolaurate (Tween 20), sulfanilamide, N-(1-naphthylethylenediamine),<br />

phosphoric acid, proteinase K, RPMI 1640 medium, Dulbecco’s Modified<br />

Eagle’s Medium (DMEM), Fetal Bovine Serum (FBS), Streptomycin and Penicillin, Trypan<br />

Blue, Sodium bicarbonate, agarose, bovine serum albumin (BSA), Sarcosyl and ethidium were<br />

procured from Sigma Chemicals (USA). PVDF (poly vinylidene difluoride) membrane and Nitro<br />

cellulose membrane were from Amersham Pharmacia Biotech (U.K). Chemiluminescence<br />

western blotting kits (Mouse/rabbit), RNA tissue kit were obtained from Roche Molecular<br />

Biochemicals (Germany). cMaster RT kit was procured from Eppendorf, Germany. Konica AX<br />

medical X-Ray films and Kodak developer and fixer and other chemicals were procured locally.<br />

The primary antibodies used were mouse anti-pATM (S1981), rabbit anti-γ-H2AX<br />

(S139), rabbit anti-pChk1 (Ser296), rabbit anti-pChk2 (Thr68), rabbit anti-pBRCA1 (Ser1524),<br />

rabbit anti-pATR (Ser428) and mouse anti-phospho-p53 (S15) were procured from Cell<br />

Signaling, USA. Secondary antibodies used were Alexa Fluor 488 goat anti-rabbit IgG and<br />

Alexa Fluor 488 goat anti-mouse IgG were obtained from Invitrogen, Molecular Probe, USA.<br />

80

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