def build_blast_jobs
      @job ||= Job.new
      @job.build_blastn_job  if @job.blastn_job.nil?
      @job.build_blastx_job  if @job.blastx_job.nil?
      @job.build_tblastn_job if @job.tblastn_job.nil?
      @job.build_blastp_job  if @job.blastp_job.nil?
    end
def build_blast_jobs
      @job ||= Job.new
      @job.build_blastn_job  if @job.blastn_job.nil?
      @job.build_blastx_job  if @job.blastx_job.nil?
      @job.build_tblastn_job if @job.tblastn_job.nil?
      @job.build_blastp_job  if @job.blastp_job.nil?
    end
Create new Job and build associations.