>1str_A: STREPTAVIDIN AEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTW SGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKP >1str_B: STREPTAVIDIN AEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTW SGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKP >1str_C: AC-CHPQNT-NH2 XCHPQNTX >1str_D: AC-CHPQNT-NH2 XCHPQNTX