| Q650L4 | METK_BACFR | Bacteroides fragilis (strain YCH46) | metK BF0061 | Detail |
| Q476V0 | METK_CUPPJ | Cupriavidus pinatubonensis (strain JMP 134 / LMG 1197) (Cupriavidus necator (strain JMP 134)) | metK Reut_A0201 | Detail |
| Q6BWE3 | MCD4_DEBHA | Debaryomyces hansenii (strain ATCC 36239 / CBS 767 / JCM 1990 / NBRC 0083 / IGC 2968) (Yeast) (Torulaspora hansenii) | MCD4 DEHA2B12012g | Detail |
| Q5AXD1 | MCD4_EMENI | Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139) (Aspergillus nidulans) | mcd4 AN7049 | Detail |
| Q58270 | IDSA_METJA | Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440) (Methanococcus jannaschii) | idsA MJ0860 | Detail |
| A6VHQ4 | METK_METM7 | Methanococcus maripaludis (strain C7 / ATCC BAA-1331) | mat MmarC7_0913 | Detail |
| B8HWM0 | METK_CYAP4 | Cyanothece sp. (strain PCC 7425 / ATCC 29141) | metK Cyan7425_4132 | Detail |
| Q8WZK2 | MCD4_SCHPO | Schizosaccharomyces pombe (strain 972 / ATCC 24843) (Fission yeast) | its8 mcd4 SPBC839.08c | Detail |
| Q9FVG7 | METK2_PINCO | Pinus contorta (Shore pine) (Lodgepole pine) | SAMS2 | Detail |
| P43281 | METK2_SOLLC | Solanum lycopersicum (Tomato) (Lycopersicon esculentum) | SAM2 | Detail |