hi, anyone please suggest me technique to detect presence of homodimer formation.

I need to know homodimer formation of mouse nfkb1 which has mol wt of 50 Kda and when i am infecting raw cells with H.pylori i need to check formation of p50 homodimer which has mol wt of 100 kda, the problem i am facing is my ab already gives two bands-one of p50 and another of p105(p50-precursor), so it will be difficult to differentiate between p100 and p105.

Could anyone has experience of detecting difference of minute 5 kda with any gel type.

please help

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