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Substitutions

substitution

1. The act of putting one thing in the place of another, especially the chemical replacement of one element or radical by some other.

2. A defense mechanism, operating unconsciously, in which an unattainable or unacceptable goal, emotion or object is replaced by one that is attainable or acceptable.

Origin: L. Substitutio, from statuere = to place


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Re: I am afraid to ask but, High school freshman - Honors Class

... she is being taught is going to leave her behind. This is especially troubeling to me since this is the field she wishes to work in. 1. Base-pair substitutions involving the third base of a codon are unlikely to result in an error in the polypeptide, this is because? A. substitutions are corrected ...

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by tatum123
Fri Sep 12, 2008 6:55 pm
 
Forum: Molecular Biology
Topic: I am afraid to ask but, High school freshman - Honors Class
Replies: 15
Views: 2875

I am afraid to ask but, High school freshman - Honors Class

... are correct.' Thanks for any advice you all may give. Here is a sample question, one we tried to answer but are not sure it is correct. Base-pair substitutions involving the third base of a codon are unlikely to result in an error in the polypeptide. This is because I think it is because: Substitutions ...

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by tatum123
Wed Sep 10, 2008 11:53 pm
 
Forum: Molecular Biology
Topic: I am afraid to ask but, High school freshman - Honors Class
Replies: 15
Views: 2875

Re: Peptide binding to MHC molecule

... likely that tyrosine can substitute for serine especially if the serine is making an important contact with MHC. Just imagining how a series of substitutions might go, substituting glycine for serine would be probably OK volume-wise (-H is smaller the -CH2OH) but doesn’t have the possibility ...

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by blcr11
Sun Aug 24, 2008 6:42 pm
 
Forum: Molecular Biology
Topic: Peptide binding to MHC molecule
Replies: 1
Views: 720

Re: Are men Necessary?

... while taking their sperm (as does black widows)... but they have other useful attributes *cough*inbed*cough* that other mechanical... artificial substitutions couldn't make up for. Well that's the way I see it, better be good for one thing.

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by nibs02
Wed Feb 06, 2008 12:11 am
 
Forum: General Discussion
Topic: Are men Necessary?
Replies: 36
Views: 2432

ITS-PCR

... Reaction (PCR) using short (usually 10 nucleotide) primers of arbitrary sequences. Polymorphism of amplified fragments are caused by: (1) base substitutions or deletions in the priming sites, (2) Insertions that render priming sites too distant to support amplification, or (3) insertions or ...

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by canalon
Thu Sep 06, 2007 2:14 pm
 
Forum: Molecular Biology
Topic: ITS-PCR
Replies: 2
Views: 886
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