J. B. LOEFER AND O. H. SCHERBAUM 
“TABLED 
COMPARATIVE TABULATION FOR FREE AMINO ACIDS AND RELATED COMPOUNDS REPORTED 
IN PROTOZOA 


a combined determination; 
present (relative quantity not indicated) ; 
not mentioned; 
very weak or absent; 
low concentration ; 
abundant; 
very abundant. 
these sulfur-containing substances and “unknowns” 
shown in the next table. 
are the variables among the strains 










= 
Sea guies 
S = bs = 8s y 
= Fe Ni 3 SS g ems sz 4 3 Sg z 
eof §,2 Ee2 S82 25% Eee E28 $OS $02 Ebed 
Free amino acids Re Sales og) SS Sse Roms Sa SES B22 28 aes 
an SSs 83m 88eu 88a S82 S88 Sm SEG SEZ seEs 
related compounds So Sich 8 sa SS Sasa Sik oz S35 FES h as pe 
S.Sa 8S °a 88a SER SE5 SRuUS BES Sie Sz Sau & 
ae eh eh Sesich Si (Se 8 SiS Has Se Sn & 
2 2 i eee 
BS 
D 
Alanine 12 12 12 2 12 12 ++ 4++- ++ ++ 
a-Aminobutyric acid O 12 12 12 -- O O O O O 
Arginine 12 iP iP 122 1p 12 + +4 +4 a 
Asparagine O P 12 1 O O oe O a + 
Aspartic acid 12 12 12 12 12 12 a + -- — 
Cysteine O 12 O + + ** () 
| | / 
Cystine 12 O O O 1Pi- 12 + O = () 
Cysteic acid P O O O — O O O = () 
Glutamic acid 12 2 12 12 12 12 +t ++ ++ + + 
Glutamine O O O O O O ch O + == 
Glycine 12 12) 1p) 1 1p? P +444 +44 ++ 
Hydroxyproline 1e O — O O O O 
Leucine O 12 12 2 12 12 ftoe4+4+ 44 ++ 
/ / / | / | / 
Isoleucine 12 12 12 P P iP ++ 4+ 4-4 Span 
/ / 
Phenylalanine iP 12 — — 12 12 + + + ++ + + 
Lysine 12 12 12 12 12 ++ ++ ao + 
/ / 
Histidine O P — + + o + 
Proline P P P 12 P* 12 =E ar == a5 
Serine O 12 12 ++ + ++ ++ 
Threonine 12) 12) 12 AF qe SP Se 
Tryptophane O O — “+ O O O 
Taurine O O O O — O 35 O 25 () 
Tyrosine P P P P Pp Pp ae ae aL ab 
Valine P 12 ie ++ + +--+ a= SF 
/ / 
Methionine 12) 12) 12 12 12 P + + ++ spar 
Methionine sulfoxide O O O O P O O O O O 
Total number amino 
acids present 16 14 13 13 18 07 21 17 22 T8—21 
Number of unknowns O O O O O O O O Tel PK OS aKa) 

References p. 114 

* Listed as absent in text, but shown as present in table 14. 
** Not designated, but may be represented in cystine spot. 
