The part of FB that has structural similarity with sphingoid bases ( the aminopentol part ) may interact with the sphinganine binding site , .
The negatively charged tricarbyllic acid groups may interact with the fatty acyl - CoA binding site .
The part of FB that has structural similarity with sphingoid bases ( the aminopentol part ) may interact with the sphinganine binding site , whereas the negatively charged tricarbyllic acid groups may interact with the fatty acyl - CoA binding site .