X1            X2               X1.1          X2.1
      Composite       Element          Composite       Element
14-3-3_epsilon-M-C -0.8660101895 14-3-3_epsilon-M-C -0.6814387425
4E-BP1_pS65-R-V  0.1056560215    4E-BP1_pS65-R-V  0.1787506005
4E-BP1_pT37T46-R-V  0.6408257495 4E-BP1_pT37T46-R-V -0.7485933875
4E-BP1_pT70-R-C  0.6413568085    4E-BP1_pT70-R-C  0.9554481415

datafr[1,]

X1      X2      X1.1      X2.1
 Composite    Element   Composite Element

as.character(c(datafr[1,]))
[1] "49"  "161" "49"  "161"

as.character(unlist(datafr[1, ]))