Search found 37 matches

by snowcapk
Sat Apr 19, 2008 9:34 am
Forum: Human Biology
Topic: Substintia Nigra
Replies: 3
Views: 4283

I heard it is a byproduct of dopamine (and epinephrine and norepinephrine) synthesis.
by snowcapk
Sat Apr 19, 2008 9:31 am
Forum: Cell Biology
Topic: human papilloma virus
Replies: 2
Views: 3245

I forget the specifics, but find a list of the proteins encoded by HPV (there are only 9-12 or so) and look at the function for each. I think there are two viral proteins that inhibit two different cellular tumor suppressors, p53 and retinoblastoma. Epithelial stem cells infected with HPV will not e...
by snowcapk
Sun Apr 13, 2008 11:56 pm
Forum: Molecular Biology
Topic: Cloning and Telomerase
Replies: 2
Views: 2647

Carebear, another thing to consider is that there is no evidence that telomere shortening results in complete loss of telomeres (and thus loss of genes at chromatid ends) within the lifetime of a normal sheep, or even twice the normal lifetime. In other words, even if the telomerase gene were comple...
by snowcapk
Sat Apr 12, 2008 2:01 am
Forum: Molecular Biology
Topic: Could animal sperm fertilize a human egg?
Replies: 5
Views: 31519

Well, the zygote would probably not instantaneously abort. In sea urchin, polyspermy does not result in "instantaneous abortion" and development can continue through gastrulation (cf. Boveri). This development occurs even though 2(+) asters are introduced into the egg, which royally f***s ...
by snowcapk
Thu Apr 10, 2008 4:59 am
Forum: Molecular Biology
Topic: Promoter Region
Replies: 3
Views: 3427

Thymine and adenine form two hydrogen bonds when paired, while guanine and cytosine form three hydrogen bonds per bp. An AT-rich region is thus easier to melt because fewer bonds per bp hold it together.
by snowcapk
Mon Mar 31, 2008 7:11 am
Forum: Molecular Biology
Topic: Antibodies
Replies: 2
Views: 1450

You can read about it in Janeway on NCBI ("The Development and Survival of Lymphocytes").
by snowcapk
Sun Mar 30, 2008 7:49 pm
Forum: Microbiology
Topic: Effect of streptomycin antibiotic on gram-positive bacteria
Replies: 1
Views: 11586

Re: Effect of streptomycin antibiotic on gram-positive bacteria

I'm not qualified to answer but I found a thread on soc.bio.microbiology ( here ) that can help. Basically, that guy had a result opposite yours (i.e. penicillin more effective against streptomycin for his g+ bacteria, Staph. albus). There is a lot of speculation on that thread, but the gist is that...
by snowcapk
Sun Mar 30, 2008 9:16 am
Forum: Molecular Biology
Topic: Is there any exception?
Replies: 6
Views: 3155

Re: Is there any exception?

mashimlro wrote:others?

Mature T cells and B cells have undergone genomic rearrangement. This allows them to produce unique TCRs/antibodies from a gene that is created through recombination/mutation.
by snowcapk
Sat Mar 29, 2008 9:01 pm
Forum: Genetics
Topic: Question on Turners syndrome
Replies: 4
Views: 3578

Re: Question on Turners syndrome

i just wana ask a question on turner sydrome.In turner syndrom X chromosome is missing..so i want to know X is missingfrom Male or Female? i hope u will help me out. Samar, I think the poster above is saying that only a female can have Turner syndrome. (A male embryo with no X chromosomes in unviab...
by snowcapk
Sat Mar 29, 2008 8:38 pm
Forum: Molecular Biology
Topic: Could animal sperm fertilize a human egg?
Replies: 5
Views: 31519

Guessing it will not breach the egg wall. Chemoattractants and sperm surface proteins designed to bind receptors on the zona pellucida/initiate the acrosomal reaction are species-specific.
by snowcapk
Fri Mar 28, 2008 1:04 am
Forum: Molecular Biology
Topic: Regulatory elements of genes
Replies: 3
Views: 3893

Re: Regulatory elements of genes

Can any person tell me if there are free software programs to predict the regulatory elements of genes? Second question : what i know about regulatory elements of gene is that they include Promoter, Poly A signal and Splice site. Is there any regulatory elements other than these?? Dear Roniadam, &q...
by snowcapk
Wed Mar 26, 2008 7:44 am
Forum: Molecular Biology
Topic: Lithium Chloride solution for RNA precipitation
Replies: 0
Views: 4759

Lithium Chloride solution for RNA precipitation

Brace yourselves for the question I was too embarassed to ask my labmates. The lab protocol for producing in situ hybridization probes calls for precipitation in lithium chloride solution in order to "clean up" the RNA after DIG-labeling transcription. The protocol calls for a 7.5M LiCl st...