search for: proteins

Displaying 20 results from an estimated 237 matches for "proteins".

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2012 Aug 10
3
Parsing large XML documents in R - how to optimize the speed?
...o create, and the type of functions I am using to do it. I hope that one of you will be able to point me towards a better and quicker way of doing the parsing! Here is the (simplified) structure of the relevant nodes of the xml file: <model> (many many nodes) <protein> (a couple of proteins per model node) <peptide> (1 per protein node) <domain> (1 or more per peptide node) <aa> (0 or more per domain node) </aa> </domain> </peptide> </protein> </model> Here is the basic structure of the R object tha...
2010 May 18
1
GUI commands to call for a protein from protein data bank
What I am trying to do is use GUI function, traitr, and to call for a pdb file and save it and then display it. I want to call for it by taking it from the user and then displaying it on the screen. I am having problems with that. The line pdb <- read.pdb(""ProteinCode) where proteincode should be the name of the protein, for example 1ly2, but it always ends up being protein. My
2008 Jun 16
1
Separator with " | " for read.table
Hi, I have the following data file to be parsed and captured as a data frame: __DATA__ #GDS_ID GENE_NAME GENE_DESCRIPTION GENE_FUNCTION 1007_s_at | DDR1 | discoidin domain receptor tyrosine kinase 1 | protein-coding 1053_at | RFC2 | replication factor C (activator 1) 2, 40kDa | protein-coding 117_at | HSPA6 | heat shock 70kDa protein 6 (HSP70B') | protein-coding __END__ In particular it is
2009 Dec 17
2
some help regarding combining columns from different files
Dear all, Here is my code which am using to combine 5th column from different data sets. Here is the function to do my job genesymbol.append.file <-NULL gene.column <- NULL readGeneSymbol <- function(files,genesymbol.column=5){ for(i in fnames){ temp <- read.table(fnames,header=T,sep="\t",stringsAsFactors=F,quote="\"")
2011 Apr 07
1
Two questions about metacharacter in regexprs and function return
for the script, please kindly see the script below. At line 10 and line 13, my problems occurs. The first one is I try to retrieve the gene official name from a column of a table. The pattern of official name is something starting with gene_name. For detail problems, please see the according lines. Any suggestions are appreciated example of matching source (extract the Nnat, sometime it would
2006 Mar 26
1
Newbie clustering/classification question
My laboratory is measuring the abundance of various proteins in the blood from either healthy individuals or from individuals with various diseases. I would like to determine which proteins, if any, have significantly different abundances between the healthy and diseased individuals. Currently, one of my colleagues is performing an ANOVA on each protein wi...
2006 Jun 18
2
analyze amino acid sequence (composition)of proteins
Dear R-helpers: thank your for your attention. i am a newer to R and i am doing some protein category classification based on the amino acid sequence.while i have some questions urgently. 1. any packages for analysis amino acid sequence 2. given two sequences "AAA" and "BBB",how can i combine them into "AAABBB" 3. based on "AAABBB",how can i get some
2004 Jan 06
0
Boost Protein Expression by Codon Optimization
Dear Colleague, Happy New Year! As we know, codon preference among different species could be dramatically different. To enhance the expression level of a foreign protein in a particular expression system (E.coli, Yeast, Insect, or Mammalian cell), it is very important to adjust the codon frequency of the foreign protein to match that of the host expression system. One classic example is GFP
2004 Jan 08
1
Boost Protein Expression by Codon Optimization
Dear Colleague, Happy New Year! As we know, codon preference among different species could be dramatically different. To enhance the expression level of a foreign protein in a particular expression system (E.coli, Yeast, Insect, or Mammalian cell), it is very important to adjust the codon frequency of the foreign protein to match that of the host expression system. One classic example is GFP
2008 Jun 16
2
Creating a Hash from Data.Frame
Hi, I have the following data frame: > print(mydatframe) __DATAFRAME__ V1 V2 V3 1 1007_s_at DDR1 discoidin domain receptor tyrosine kinase 1 2 1053_at RFC2 replication factor C (activator 1) 2, 40kDa 3 117_at HSPA6 heat shock 70kDa protein 6 (HSP70B') __END__ Is there a way to create a hash with V2 as Key and V3 as its value? - Gundala Viswanath Jakarta - Indonesia
2010 Jan 05
2
Align two protein sequences using BLAST
Dear R users, I would like to align two protein sequences using BLAST (bl2seq). The question is whether this programm have been implemented in R. Thank you for your help, Alla.
2010 May 11
1
comparing and combing files
...PROTEIN,AD023 PROTEIN Protein metabolism and modification Protein biosynthesis A_51_P100052 NM_198863.1 Leucine-rich repeats typical subtype,Leucine-rich repeat,Leucine-rich repeats cysteine-rich flanking regions N-terminal,Cysteine-rich flanking regions C-terminal LEUCINE-RICH TRANSMEMBRANE PROTEINS Biological process unclassified - A_51_P100174 NM_008613.2 - MEIOSIS-SPECIFIC NUCLEAR STRUCTURAL PROTEIN 1 Developmental processes Meiosis A_51_P100218 NM_134198.1 Vomeronasal receptors type 1,GPCRs rhodopsin-like superfamily VOMERONASAL PHEROMONE RECEPTOR Signal transduction,Sensory p...
2006 Jul 31
0
Three questions about a model for possibly periodic data with varying amplitude
Hi dear R community, I have up to 12 measures of a protein for each of 6 patients, taken every two or three days. The pattern of the protein looks periodic, but the height of the peaks is highly variable. It's something like this: patient <- data.frame( day = c(1, 3, 5, 8, 10, 12, 15, 17, 19, 22, 24, 26), protein = c(5, 3, 10, 7, 2, 8, 25, 12, 7, 20, 10, 5) ) plot(patient$day,
2009 Sep 16
3
How to extract a specific substring from a string (regular expressions) ? See details inside
Hi all, I have thousands of strings like these ones: "1159_1; YP_177963; PPE FAMILY PROTEIN" "1100_13; SECRETED L-ALANINE DEHYDROGENASE ALD CAA15575" "1141_24; gi;2894249;emb;CAA17111.1; PROBABLE ISOCITRATE DEHYDROGENASE" and various others.. I'm interested to extract the code for the protein (in this example: YP_177963, CAA15575, CAA17111). I
2008 May 29
1
Separator argument in read.table
Hi, Suppose I have the following tabular data: 1729_at | TRADD | TNFRSF1A-associated via death domain | protein-coding 1773_at | FNTB | farnesyltransferase, CAAX box, beta | protein-coding 177_at | PLD1 | phospholipase D1, phosphatidylcholine-specific | protein-coding What is the right separator used for read.table function? I tried this: dat <-
2011 Sep 13
2
GO & Protein Complex Analysis for Homo sapiens
Dear All, I need to fetch GO ontologies for Homo sapiens with their mappings to corresponding Uniprot identifiers. I would be using this information to compare result from a clustering algorithm with existing protein complexes. This would be a test to check how the clustering algorithm accurately captures GO terms with respect to the known protein complexes. Can anyone suggest a simple workflow
2007 May 23
2
problem with read.table
Dear all, I try to use read.table to get the data from a tab delimited file, and some of the data is shown below: 3185 heterogeneous nuclear ribonucleoprotein F 3187 heterogeneous nuclear ribonucleoprotein H1 (H) 3188 heterogeneous nuclear ribonucleoprotein H2 (H') 3189 heterogeneous nuclear ribonucleoprotein H3 (2H9) 3190 heterogeneous nuclear ribonucleoprotein K ///
2006 Sep 20
5
multiple lines and plot
Hi. Please, how can I put together 2 or more lines at the same scatterplot ? Example: measures of protein intake (quantitative) of 4 children over 30 days, by day. How to plot all children at same graphic: Protein X Time ? Is there any command like "overlay" ? Thank you, Mauricio
2012 May 14
1
Plot
Hello, I am trying to make a plot of the rates of an enzyme against three different protein concentrations (there are 45 rates in total and split up into 3 groups of 15, each receiving one of the 3 protein concentrations). When I enter the following code I instead get 3 separate boxplots for each of the three different protein concentrations ... plot(rate ~ ferm, data=LDH, col=LDH$rate,
2010 Apr 08
3
[LLVMdev] darwin llvm-gfortran Polyhedron 2005 results
Building the current release 2.7 branch on x86_64-apple-darwin10 with r81455 reverted, I get the following Polyhedron 2005 benchmark results (with no test failures)... ================================================================================ Date & Time : 7 Apr 2010 22:24:16 Test Name : llvm_gfortran_lin_p4 Compile Command : llvm-gfortran -ffast-math -funroll-loops -msse3