\name{fastaDescription}
\alias{fastaDescription}

\title{Description field reading of a fasta sequence}

\description{
  Reads the description field of a fasta sequence
}

\usage{
fastaDescription(file, name="")
}

\arguments{
  \item{file}{String/scalar, File name of the fasta sequences bank}
  \item{name}{String/scalar, Name of the sequence whose description must be retrieved, 
  (if not specified : first sequence of the file)
  }
}

\value{
  The description field (the remaining of the heading line after the first space).
  if error : NULL
}


\author{A. Lucas}


\keyword{utilities}


\examples{
seqNcbi("BY608190",file="BY608190.fa")

fastaDescription(file="BY608190.fa",name="gi|26943372|gb|BY608190.1|BY608190")

}