Table 3.

Performance metrics of the proposed approach and hidden Markov model (HMM).

Approach	e-value	Sensitivity	Specificity	Accuracy	Precision	MCC
HMM	1	0.834	0.979	0.907	0.980	0.841
	10	0.876	0.814	0.845	0.813	0.709
Proposed	NA	0.887	0.993	0.94	0.992	0.885

The performance of the developed approach was also compared with that of HMM for classification of nitrogen-fixation (nif) and non-nitrogen-fixation (non-nif) proteins. In terms of all the performance metrics, the developed approach achieved higher accuracies than that of HMM. NA, Not applicable.