results observed in a crude preparation of urinary hcg demonstrated that in addition to the carboxyl-terminal part of the reduced hcg beta nicked subunit ( beta ns ) [ hcg beta- ( 48-145 ) ] , three other fragments of mol wt 18,000 ( f1 ) , 16,500 ( f2 ) , and 12,000 ( f3 ) were detectable after cleavage of disulfide bonds .
C1141639
preparation
C0106132
hcg