"molecular identification" is a correct and usable phrase in written English.
You could use it when describing a process of identifying something at the molecular level. For example, "This method of molecular identification allows us to determine the identity of the sample in just minutes."
Del Serrone, P. et al. Molecular identification of Panax ginseng C.A. Meyer in ginseng commercial products.
Molecular identification of bacteria associated with filaments of Nodulariaspumigena and their effect on the cyanobacterial growth.
Hassold, S. et al. DNA Barcoding of Malagasy Rosewoods: Towards a Molecular Identification of CITES-Listed Dalbergia Species.
Nonetheless, point mutations putatively involved in the AIEC phenotype can be used for the molecular identification of the AIEC pathotype.
Abarenkov, K. et al. The UNITE database for molecular identification of fungi recent updates and future perspectives.
Kim, I. J., Zhang, Y. F., Yamagata, M., Meister, M. & Sanes, J. R. Molecular identification of a retinal cell type that responds to upward motion.
Luo, W., Enomoto, H., Rice, F.L., Milbrandt, J. & Ginty, D.D. Molecular identification of rapidly adapting mechanoreceptors and their developmental dependence on ret signaling.
Abarenkov K, Nilsson RH, Larsson KH, Alexander IJ, Eberhardt U, Erland S, et al. The UNITE database for molecular identification of fungi – recent updates and future perspectives.
Koljalg U, Larsson KH, Abarenkov K, Nilsson RH, Alexander IJ, Eberhardt U, et al. UNITE: a database providing web-based methods for the molecular identification of ectomycorrhizal fungi.
Then we selected three representative isolates of each morphotype for molecular identification by sequencing the internal transcribed spacer (ITS) region of nuclear ribosomal DNA (rDNA).
Yaro, M., Munyard, K. A., Stear, M. J. & Groth, D. M. Molecular identification of livestock breeds: a tool for modern conservation biology.
