A gymnosperm extensin contains the serine-tetrahydroxyproline motif.

MLA

Fong, C., et al. “A Gymnosperm Extensin Contains the Serine-Tetrahydroxyproline Motif.” Plant Physiology, vol. 99, no. 2, June 1992, pp. 548–52. EBSCOhost, https://doi.org/10.1104/pp.99.2.548.

APA

Fong, C., Kieliszewski, M. J., de Zacks, R., Leykam, J. F., & Lamport, D. T. (1992). A gymnosperm extensin contains the serine-tetrahydroxyproline motif. Plant Physiology, 99(2), 548–552. https://doi.org/10.1104/pp.99.2.548

Chicago

Fong, C, M J Kieliszewski, R de Zacks, J F Leykam, and D T Lamport. 1992. “A Gymnosperm Extensin Contains the Serine-Tetrahydroxyproline Motif.” Plant Physiology 99 (2): 548–52. doi:10.1104/pp.99.2.548.