PSAD-1 (photosystem I subunit D-1). Identical to Photosystem I reaction center subunit II-1, chloroplast precursor (psaD1) [Arabidopsis Thaliana] (GB:Q9S7H1;GB:Q8L9B6); similar to PSAD-2 (photosystem I subunit D-2) [Arabidopsis thaliana] (TAIR:AT1G03130.1); similar to PSI reaction center subunit II [Citrus sinensis] (GB:BAF80479.1); contains InterPro domain Photosystem I protein PsaD; (InterPro:IPR003685)