Figure 2.

Hydrophobicity of various cytokinin species (CK) has been predicted using cheminformatics tools. In the second column, log(P) values are estimated according to [54]; this method yields log(P) as a sum of individual Wildman-Crippen atomic contributions. Calculation of Wildman-Crippen contributions has been done using RDKit: Open-source cheminformatics software (http://www.rdkit.org, accessed on 4 January 2021). In the third column, log(P) values are estimated using a method provided by Molinspiration Cheminformatics free web services (https://www.molinspiration.com, accessed on 4 January 2021). To compare these predictions with actual experimental data, retention times of internal standards for high-performance liquid chromatography (HPLC) separation of CKs taken from [55] are given in the last column. For all three datasets, relative hydrophobicity range is visualized using the colour scale given below the table. The colour range is normalized within each column. Note that not all of the listed CKs were analysed in [55], as indicated by missing values (“N/A”).