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21347
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location Marseille, France
age 34
visits member for 2 years, 3 months
seen 1 hour ago

Elected moderator on Unix & Linux. Feel free to @ping me in chat if there's anything I can help you with.

I am a computational biologist with a background in biology, not computers. My PhD work was on gene prediction and comparative genomics but my current research is in systems biology, specifically protein-protein interaction networks.

profile for terdon on Stack Exchange, a network of free, community-driven Q&A sites


1h
comment Does one parent transmit more DNA to the offspring that the other one?
Especially since the questions specifies DNA.
1h
comment Do “Giraffe Weevil” males build Nests
Are these photographs of the specimen you found or are they taken from the web? If the latter, the likeliest explanation is that what you found looks very similar but is a different species.
1d
comment Are there 23 pairs of chromosomes present in each cell, or in the entire human body?
Hi and welcome to the site. Please do at least some minimal research before asking here. For example, if you had looked up human chromosome on wikipedia, you would have found an answer: "Human cells have 23 pairs of chromosomes (22 pairs of autosomes and one pair of sex chromosomes), giving a total of 46 per cell."
1d
comment Is one metabolomic database more searchable than any other?
Sorry but this kind of question is completely based on opinion and that is off topic here. For example, I prefer databases that allow me to access them using command line tools for batch searching or that allow access through scripts. What you call "user friendly" I call "excessively manual" and it breaks my workflow.
Nov
20
comment Why is the DNA codon table “equal” to the RNA codon table
@Sosi no, the double strands are essential for many things including i) DNA replication ii) error repair (the "right" sequence can be inferred from the opposite strand iii) most importantly, genes can be found on both strands. The sense/antisense is only with respect to a given gene. What is the sense strand for geneX can be the antisense for geneY.
Nov
19
comment Incestual Reproduction in Animals
Since inbreeding can lead to greater chances of genetic abnormalities, it seems reasonable that individuals who avoid it would be selected for in the long run but I don't know of any studies on this.
Nov
19
comment Frequent male nocturnal emission
"Quit being a troll and answer the bloody question?" Seriously? You might want to read our help center and understand what this site is about instead of insulting people who are only trying to help you.
Nov
17
comment what the best E-value cutoff in the miRNA homology search
Absolutely. Your parameters sound fine. I just wouldn't use an evalue of 10 as a way of determining whether a hit was interesting. I'd leave it at 10 or higher to be sure to get everything and then ignore it and filter on other things as you suggest.
Nov
17
comment Are there any known mutual symbiotic relationships that has more than two agents?
I'm not entirely sure that this constitutes symbiosis. It's a very valid point and +1 but I wonder if someone working in the field would consider it so.
Nov
15
comment what the best E-value cutoff in the miRNA homology search
10? Really? I haven't worked with miRs but 10 seems extremely high. In fact, working on short nucleotide sequences, I wouldn't recommend using the evalue at all. I'd go for plain %id and % coverage instead.
Nov
12
comment Find protein homologs with BLASTp
What species are you comparing? How distant are they? If close enough, "real" homologs should be able to form a single HSP spanning most of the target sequences.
Nov
10
comment Why don't fish groom each other?
@VatsalManot yes, but I think it's applicable to all. In order to be able to eat parasites, you need to be small enough to get at them. Presumably, if you're the same species, you will be too big. Still, as I said, this is pure speculation.
Nov
9
comment How to evolutionary explain menstrural cycles synchronization?
@Chris that's really interesting, I am aware of much anectodal evidence that suggests this is true. The wikipedia link you gave cites PMID:23480070 but I don't have access to it. Do you? Does it indeed confirm that it is a myth (the abstract suggests so but I don't know for sure)?
Nov
4
comment Local BLAST Copy Number per Hit
That depends on how you define a hit. Are we talking about homologous genes from different species? Multiple, slightly different copies of the same gene in a single genome? Multiple, identical copies of a single gene which is repeated in the database?
Nov
4
comment Why are the genomes of some trees so large?
+1. Another interesting point is that there is some evidence that the retrotranspositions of repetitive sequences such as Alu (which represents 10% of the human genome) are activated under conditions of cellular stress and can help shuffle the genome‌​, providing new variety.
Nov
3
comment Do blind people learn Braille equally fast as the sighted?
I'm not sure this is on topic here. It sounds like it might be a better fit for Cognitive Sciences.
Oct
31
comment What is the difference between embryology and developmental biology?
@tel I know, that was just a tongue-in-cheek comment pointing out why not all of developmental biology can be called embryology.
Oct
31
comment What is the difference between embryology and developmental biology?
Do worms have embryos?
Oct
28
comment For how long can a raven stay airborne (a week or more)?
Quite apart from using a mythical story to ask a scientific question, I don't see what makes you think that the raven was flying around all that time. For all you know, and as seems more likely, it drowned. Could you edit your question, remove the biblical references and just ask something specific about an animal's behavior?
Oct
28
comment For how long can a raven stay airborne (a week or more)?
Ah, but is that an African or European pigeon?