This included including the NODULE INCEPTION (NIN) transcription factors GmNIN2a and GmNIN2b, which are required both for infection by rhizobia as well as for nodule formation [42], and the small peptide EARLY NODULIN 40 (GmENOD40-1) which in Lotus japonicus is required for nodule initiation and subsequent organogenesis [43]. Here, NIN is linked to infection.