"To assist in measuring the progress of the ball it is desirable to provide two light poles about six feet in length, connected at their lower ends with a stout cord or chain 10 yards in length," read Spalding's Official Foot Ball Guide in 1907.
High quality trimmed sequences (16 30 nt in length, reads with no "N", no more than 4 bases with quality score <10 and no more than 6 bases with quality score <13) were mapped onto plant t/rRNAs sequences from "Rfam" (excepted miRNAs), Arabidopsis tRNAs from "The Genomic tRNA Database", and plant t/rRNA sequences from "EMBL" release 95.
Prior to further analysis, reads were filtered to remove those containing ambiguous base calls, any reads <24 nucleotides in length and reads containing only homopolymers.
Successfully detected barcodes were removed from the sequence leaving paired-end reads of 30 nt in length, while reads containing no recognizable barcode sequence were discarded.
Reads were filtered to remove reads containing homopolymer stretches longer than 10 bases, ambiguous bases, reads less than 200 bp in length and reads longer than 275 bp using Mothur.
Since this difference was likely due to difference in length of reads (mean ± SD, Standard: 269.4±9.8 bp, Titanium: 329.2±11.8 bp), the Titanium reads were trimmed to 270 bp in order to correct for this effect.
After removing the reads that were either shorter than 19 nt or longer than 26 nt in length, the reads were blasted against a miRNA database consisting of all human miRNA mature sequence information obtained from miRBase.
Sequences that were shorter than 200 bp in length and reads containing any unresolved nucleotides were removed from the 18 pyrosequencing-derived datasets.
Write several short headline stories of 15 to 20 seconds in length and read them into your computer using an external mike plugged into the mike jack.
For a word length of 7 bp and an average read length of 80 bp, about 10% of the original heptamers in the full-length reads were lost.
