nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqwpgc962e0x58tm37hv4jty52s09j664a6qzvte7lsyceuqug4arqqwxtr4 (nprofile…xtr4) it seems that it is a meat- centric term. This has a fair and accessible discussion (not that you need something simplified given your background)
https://www.verywellhealth.com/incomplete-protein-8612939