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Polypeptide chainwith 21 basic and 15 acidic residues...

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Polypeptide chainwith 21 basic and 15 acidic residues...

Postby qwertyqwerty » Wed Aug 15, 2012 1:18 am

So if a polypeptide chain of 214 amino acid residues has 21 basic and 15 acidic residues, the protein :

a) is amphipathic
b) will be positively charged at neutral pH
c) unlikely to be found inside cells because it is too highly charged
d) will have no net charge at pH 7
e) would be expected to form 15 ion fairs

I think its between b and c but I'm not sure which one. And does amphipathic only apply to polar/non polar, and not acidic/basic, right?
qwertyqwerty
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Postby JackBean » Wed Aug 15, 2012 9:39 am

c is really funny :lol: no, seriously, it's simply b
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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