808 
Schistocerca gregaria, amino acids, 117, 120 
—, —, absorption in gut, 765 
—, glutamine metabolism, 131 
Sciatic nerve, hen, amino acids, 473, 476, 478 
—, —, ethanolamine derivatives, 481 
—, rabbit, amino acids, 473 
—, rat, amino acids, 473 
Scorzonera hispanica, amino acids, 65 
—, lysopine in crown gall tissue from, 43 
Scurvy, effect on urine amino acids, 275 
Serine, in brain, 475, 476 
—, detection on paper chromatograms, 9 
— ethanolamine phosphodiester, 169, 187-192 
— — —, in chick embryo, 511 
—, Im nerve, 475-477 
— phospholipid, conversion to choline phos- 
pholipid, 194 
—, population-dependent growth requirement, 
700, 7OI 
—, racemization, 189, 192 
—, retention in erythrocyte, 246 
—, sweat, 204 
—, uptake by bacterial protoplasts, 615 
p-Serine, in lombricine, 169, 188 
—, occurrence, 189 
Servo-mechanisms, and stability of pool compo- 
sition, 346-348 
Sex differences, in amino acid pool, 118 
—, blood amino acids, 198 
—, human urine, 201 
Sex peptide, 118 
Sheep, brain, amino acids, 472, 473, 475, 476 
—, —, ethanolamine derivatives, 481 
Shikimic acid metabolism, effect boron 
deficiency, 665 
Shock, effect on urine amino acids, 277 
Sialic acid, in urine, 509 
Silk gland, amino acids, 126 
Silver salts, effect on pool, 99 
Siphonaria lineolata, taurine, 165, 166 
Slime mold, methionine uptake, 683 
—, protein turnover, 683 
Smerinthus ocellatus, amino acids, 116 
Snails, species-specific pool differences, 123 
Snake, muscle, serine ethanolamine phospho- 
diester, 187 
Sodium benzoate, inhibition of D-amino acid 
oxidase, 514 
— fluoride, effect on urine amino acids, 277 
— ion, effect on amino acid transport, 543, 544 
—, replacement of muscle potassium, 337 
Somatropic hormone, effect on cell perme- 
ability, 267 
Soybean leaves, photosynthesized amino acids, 
660, 663 
— —, tryptophane synthesis, 665 
— seed (see Glycine max) 
Space technique, use in studying amino acid 
uptake, 612 
Species, differences in pool composition, 122— 
124 
Spermine, effect on protoplast stability, 581 
—, occurrence in Ciona intestinalis, 171 
Spheroplast, Escherichia coli conversion to, 766 
SUBJECT INDEX 
Sphinx ligustri, amino acids, 117 
—, soluble proteins, 129 
Spinal cord, effect vitamin B, deficiency on 
cystathionine in, 477 
—, hen, amino acids, 473, 476, 478 
—, —, ethanolamine derivatives, 481 
—, rabbit, amino acids, 473 
Spivontocaris picta, amino acids, 181, 182 
Spleen, chicken, serine ethanolamine phospho- 
diester, 190 
—, rabbit, effect nitrogen mustard on amino 
acids, 406, 407 
—, rat, effect aminooxyacetic acid on amino 
acids, 505 
—, —, effect hydroxylamine on amino acids, 
504 
Spore, bacterial, amino acids, 75, 76, 81 
— formation, role of N-succinyl-t-glutamic 
acid, 91 
Squamous cell carcinoma, mouse, amino acids, 
285 
Squid, giant nerve axoplasm, amino acids, 473, 
476, 478-480 
Staphylococcus aureus, amino acids, 75, 76, 79, 
87 
—, — accumulation capacity, 570, 571 
—, a-aminoisobutyric acid accumulation, 612 
—, extraction of pool from, 74 
—, glutamate pool formation, 100 
—, permeability, 579 
Starvation, effect on amino acids, in blood, 269 
—, — — in rat tissues, 334-337 
—, — occurrence of peptides in Dyosophila, 
157 
—, — pool composition in insects, 122 
—, — protein turnover in slime mold, 686 
—, role in protein and RNA turnover, 650 
Steady-state distribution of carbon, 634-636, 
639, 640 
Stelletta sp., amino acids, 177, 180 
Stereospecific sites, in amino acid pool for- 
mation, 599, 604 
Stereospecificity, amino acid efflux, brain, 560, 
501 
—, in tyrosine transport, 546-548, 551 
Stereum purpureum, amino acids, 88 
Sterile autolysis, lberation of amino acids, 
293-298 
Steroids, effect on cell membrane, 267 
Stoichiometric site model, amino acid pool 
formation, 603 
Streptococci, amino acids, 77 
Streptococcus faecalis, adenine peptides in, 91 
— —, amino acids, 94, 95 
— —, — accumulation capacity, 570 
— —, nutritional deficiency, effect on, 97 
— -—, protoplasts, amino acid uptake and 
swelling, 764, 765 
— —, —, effect pyridoxal 
uptake, 612 
——, —, membrane composition, 615 
— —, —, permeability, 580 
— —, —, solute uptake, 615 
— —, —, swelling, 102 
, 
on amino acid 
