Fig. 4

N50 of assembly results for different assembly strategies. N50 values for the de novo assembly results for E. coli DH1 and S. Parasanguinis FW213 are shown together with their standard errors of the mean. Group A [PE] and Group A [SE] represent all reads assembled as paired-end reads and single end reads, respectively. Group A [PE + SE] represents all the non-overlapped paired-end reads assembled together with merged reads. Group M [PE] and Group M [SE] represent Group M reads assembled as paired-end reads and single end reads, respectively. Although Group A [PE] always had a higher or similar N50 compared with Group A [SE], Group M [SE] yielded a higher N50 than Group M [PE] when the depth of read coverage was low