Actually I want to build a homology model of a human homotrimeric protein from a FASTA sequences. After BLAST I got a template which is 91% identical but it is originated from Mouse organism. And it is the Cryo-EM structure. From there, I build a single monomeric chain of that human protein by Homology modelling. But it doesn't contain any biological assembly or asymmetric unit. So that, i am unable to build its trimeric structure. so, can you help me in two sections; 1) how to build its homotrimeric structure? 2) is there any way to generate the biological assembly coordinates from homology protein? Thanks in advance. Best regards.